Question

-4x+3=6x-7...x=-2??? Can someone c if this the right answer

Answer 1

x=-1

Answer 2

You ned to get rid of the -4x first by adding 4x to both sides.

Answer 3

3 = 10x - 7

Answer 4

add 7 to both sides

Answer 5

10 = 10x

Answer 6

divide both sides by 10

Answer 7

x = 1

Answer 8

so i get rid of the - sign in front of the -4x and just add it to the 6x

Answer 9

Yes you get rid of the -4x by +4x to both sides.
I get rid of the -4x because it is smaller than 6x...

Answer 10

ok cuz i used-4 + 6x and got -2x im lost

Answer 11

To get rid of let's say +5 you would -5 because that would give you 0
To get rid of -3 you + 3 because that would give you 0
To get rid of +7x you -7x because that would give you 0
To get rid of -4x you +4x because that would give you 0

Does that help?

Answer 12

actually since u explained it like that yes it does......sry if im being high maintenance hate not understanding my teacher sucks at his job

Answer 13

x/-7-9 =-3......the / means divide so i need to multiply?

Answer 14

OK.. You only have an x on one side so you need to get the x by itself. You always add or subtract first if needed. So you need to get rid of the -9 first

Answer 15

x/-7=-12?

Answer 16

To get rid of -9 you need to +9

-3 + 9 = 6

so x/-7 = 6

Do you understand?

Answer 17

not really.....

Answer 18

When it says to solve.. The first thing you should do is go to the side with the "x".. If both sides of the = sign have an "x" then you get rid of the smallest "x" by either adding or subtracting the "x". you do the opposite, if it is a positive "x" then you subtract. if it is a negative "x" then you add..

In this case, you only have x on one side. Do you know how to do this problem.

x + 3 = 10

Answer 19

x=7

Answer 20

Without actually just figuring that out... do you know what to do algebraically?

Answer 21

yes subtract 3 from both sides

Answer 22

Good!!!

Look at the problem we are doing and pretend the -7 is not there... we would have

x - 9 = -3

How would you solve this?

Answer 23

add 9 to both sides

Answer 24

Good.. That is what you do first on this problem.

NOw..

How would you solve 2x = 10 (algebraically)

Answer 25

divide 10 by 2 since 2x is multiplying u need to divide

Answer 26

Great..

So let's do our problem...

x/-7 - 9 = -3 You add 9 to both sides

x/-7 = 6 then to get rid of "divide by -7" you
multiply by -7 .. put a (-7) to the
left of the x and to the right of
the 6

(-7) x = 6 (-7)
-----
-7

Answer 27

the -7's cancel and you get

x = -42

Answer 28

making sense so if x/-6=-4 can i use the the -4 or the -6? sry if stupid ?

Answer 29

You always go to the side with the x... don't even look at the other side.

So all you see is x/-6

What would you do then?

Answer 30

add 6 so x=2

Answer 31

Read this to yourself x/-6



Did you say x divided by -6?

Answer 32

yes

Answer 33

So to get rid of divided by -6 you should multiply by -6.

(-6)x -4(-6)
----- =
-6


The -6's cancel and you get

x = 24

Answer 34

wow im retarded got frazzled since there was only 2 numbers.......

Answer 35

Do you have another problem?

Answer 36

im sure i will got like 20 left for homework will u b on for a while

Answer 37

Sure if you want me to help you.

Answer 38

thank u so much for taking time and being paitent

Answer 39

real quick lol 3x+5=4x+16......x=3 or -11=x

Answer 40

x = -11

3x + 5 = 4x + 16 get rid of your smallest x (3x) by
subtracting 3x from both sides

5 = x + 16 subtract 16 from both sides

-11 = x

x = -11

Answer 41

thats what i got my friend and i were in a debate

Answer 42

thx again

Answer 43

do u know how to use a algebraic calculator

Answer 44

Probably.. what do you need to know

Answer 45

trying to check my work not sure how to enter the equation my friend gave me a ti 30xa

Answer 46

You mean of the problem we just did?
Just type 3(-11) + 5 =

You should see -28

Now type 4(-11)+16 =

You should see -28

That means you were correct

Answer 47

dont i need to put x in the equation

Answer 48

No ... you put in what you got for x... in the last problem it was -11

Answer 49

ok -2(3x+1)=3x-20......can we do together?

Answer 50

Yes. When you have parentheses, you need to get rid of them first... you do this by distributive method.. can you do this?

Answer 51

yes -6x + -2=3x-20....first step

Answer 52

Good... It's best not to have a + next to a -

Just write -2 * 3x = -6x
and -2* 1 = -2

So we write -6x - 2 = 3x - 20

NOW you have x's on both sides - so get rid of the smallest x.

Answer 53

so y do we change from adding to subtracting

Answer 54

WOW.. hard to explain... Were you ever taught that when you were given a "- 5" you could change that into a "+ a negative"

Answer 55

Plus a negative 2 (+ -2)
is the same thing as subtracting 2 (-2)

Answer 56

You just never want two signs next to each other...
So going back to the problem

-2(3x + 1) you should think of this.

-2(3x) and -2(+1) so you get -6x -2

**** THE SIGN IN FRONT OF A NUMBER ALWAYS GOES WITH THAT NUMBER... it's like it belongs to that number.

Answer 57

We can do it your way... here we go

-6x + -2 = 3x - 20

How do we get x's on one side (get rid of the smallest "x")

Answer 58

ur way makes alot more sense here we go

Answer 59

just to make sure if i use the smaller x it would be 9x?

Answer 60

very good

-2 = 9x - 20

NOW that you have x on one side ONLY LOOK AT THE side with the x... What do you get rid of next.

Answer 61

or - 3x

Answer 62

To get rid of the -6x you need to +6x to both sides.

Answer 63

add 20 or 2 to both sides get -18.....-18/9x= x=-2?

Answer 64

Very important you understand what I am saying.

When there is only one x in your problem. You go to the side of the equal sign that has the x. YOUR EYES SHOULD NOT EVEN SEE THE OTHER SIDE OF THE = sign. In this case.. take your left hand and cover up the -2.

Your eyes should ONLY see 9x - 20 and in this case you do + 20 to both sides.

Answer 65

okok i knew that trying to rush so im not holding u up......x=2

Answer 66

Yes...

Answer 67

thx again whats ur name im keith

Answer 68

Andrea

Answer 69

andrea i cant thk u enough

Answer 70

Do you have another problem? By the way, if you ever need help after tonight.. I would be glad to help you.. you can email me at amcbeth328@gmail.com

Answer 71

4(3x-5)=-4x+27 that equals 12x-20=-4x+27, so would it b 12x - -4x or 12x-4x?

Answer 72

12x - 20 = -4x + 27

You have x's on both sides of the = sign.. get rid of the smallest x by doing the opposite.

Answer 73

just wanted to know if next step = 8x or 16x

Answer 74

-4x is smaller than 12x so you get rid of the

-4x by +4x to both sides

16x - 20 = 27

Answer 75

then add 20 to both

Answer 76

Yes and you won't get a nice answer

Answer 77

16x = 47 divide by 16

x = 2.9 or 47/16 which = 2 15/16

Answer 78

Any more?

Answer 79

7(4-x)+3=17......x=-2?

Answer 80

28 - 7x + 3 = 17
-7x + 31 = 17
-7x = -14
x = 2

Almost.. how do we differ

Answer 81

i meant x=2 my brain is fried forgot when u divide 2 negatives u get positive

Answer 82

Any more? I am getting tired and need to get to bed. I have to be to school early tomorrow. But if we are close, I will hang in there.

Answer 83

no im good thk u very much

Answer 84

OK Keith.. keep working hard... it will pay off for you in the long run... I could see a lot of improvement with your math tonight.

Have a good week at school.

Answer 85

u too