Question

solve. please show me how you got this.... I am so lost I need step by step help!
-15 (3 + x) = -6x -9

Answer 1

How far did you get?

Answer 2

ok first you are goign to distribute the -15 into (3+x) and end up with
-45-15 x=-6x-9

Answer 3

Now we want to get all veribles and constants on oppist sides

Answer 4

and you end up with 9-45=15x-9x

Answer 5

simplify you get -36=6x and because we are solving for x we will divide -36 by 6 and end up with x=-6

Answer 6

I started with -15 * 3 and then -15 * x to get rid of ( )
Thank you so much.... I have a few more probs I am stuck on too if your free....

Answer 7

I had it started right but didn't know what to do next. That is my problem every time.

Answer 8

Sure ask away

Answer 9

2 ( 7x + 5) = 3x -11 (2 - x)

Answer 10

ok remember first you want to distribute the 2 into (7x+5) and the -11 into the (2-x)

Answer 11

I got to 14x + 10 = 3x -22 - 11x

Answer 12

Perfect. Now just get all your x terms on one side, and the non-x terms on the other.

Answer 13

ok move your simplify both sides

Answer 14

Oh, except when you multipied the -11 to the -1 it should have be a +11x

Answer 15

err -11 to the -x rather

Answer 16

No, the 11 wasn't distributed correctly, the right side should be 3x -22 + 11x.

Answer 17

so its -11 times - x ??

Answer 18

Yes.

Answer 19

You get 14x + 10 = 14x - 22, if you subtract 14x from each side you get 10 = -22, which is false.

Answer 20

-11(2-x) = -11(2) + (-11)(-x)

Answer 21

anyone still here?

Answer 22

I can give it a go

Answer 23

2 ( 7x + 5) = 3x -11 (2 - x)

Answer 24

ok the first thing you want to do is to distribute the 2 through (7x+5)

Answer 25

I think I got it all the way until 14x + 10 = 3x -22 + 11

Answer 26

You mean 11x. There's an x there too, but everything else is correct

Answer 27

put an x on your +11

Answer 28

yes sorry

Answer 29

now bring the 3x over with the 11x and your number terms to the other side

Answer 30

then simplify both sides transpose your varibles and constansts and simplify again

Answer 31

what @ the 14 x on the left?

Answer 32

when you move things from one side to another, you have to first change the sign of the thing you're moving. the 3x will become negative

Answer 33

so 14x - 3x + 10 on the left?

Answer 34

yep. Now you can take the 10 over to the other side in the same way. change the sign, and then you can switch it over to the other side. from there, just add stuff and let me know what you get

Answer 35

11x=-32 + 11x

Answer 36

now -11 from both sides?

Answer 37

yes

Answer 38

how can I subtract 11x from 11 I thought you could only do like terms?

Answer 39

you meant to write 11x, remember? now you can subtract 11x from it

Answer 40

11x - 11x ??

Answer 41

Yea. the 11x-11x will cancel, leaving you with a false statement

Answer 42

Yea it's a false statement, kinda a trick problem

Answer 43

k how @ -10 - 3/7 x = 5

Answer 44

Start out the same way getting your varibles and constansts on different sides

Answer 45

you end up with -3/7x=15

Answer 46

Have you been taught how to cancel out a fraction?

Answer 47

I don't know all these rules and when to use them confuse me very BAD!!

Answer 48

if you move something to one side of the = sign,do you have to move something back over to replace it?

Answer 49

Inorder to cancel out the fraction we are going to multiply 7*-3 then divide by 7 which will leave us with -3x=15*7, which is -3x=105, now divide both sides by -3 and we end up with x=-35

Answer 50

No just remember whatever you do to one side you have to do to the other.

Answer 51

so if we have something like 2+x=1 we are going to subtract both sides by 2 which will give us an answer of x=-1

Answer 52

k that makes sense

Answer 53

so does -4/13 x = -20 come out to be.... x = -65 ???

Answer 54

But like we did above we want to cancel out the fraction so we first need to find a lcm for the equation. This is easy to do because we only have one fraction in the problem. So we first multiply the numerator times the lcm then divide the new numerator by the lcm

Answer 55

but we have to also multiply the other side by the lcm

Answer 56

I just realized that can't be right.... it would have to be a positive number wouldn't it?

Answer 57

correct it would be x=65

Answer 58

okay.... YAY!!!

Answer 59

how @ x - 4/11 = 3/5 would it be x = 53/55

Answer 60

or x = 3/5 ??

Answer 61

53/55 i think.....

Answer 62

i agree

Answer 63

okay you are ahuge help. Thank you...

Answer 64

No problem best of luck to you

Answer 65

you know anything @ set builder notation???

Answer 66

Yes

Answer 67

what would -5x -4 < 3 ( x - 3) be in set builder notation?

Answer 68

First distribute your 3 like you were before. You want to get some expression for x either greater or less than something else.

Answer 69

brb, in a few mins

Answer 70

Ok, back sorry. Did you distribute the 3?