Question

y-3x=13 I don't know how to do this :(

Answer 1

what are you suppose to do ? make y the subject?
we really can't help if you don't put the instructions.

Answer 2

Solve the literal equation for y

Answer 3

It just means have y alone equal to an expression.
y=mx+n

Answer 4

So all you need to do in the equation you posted is add 3x to both sides.

Answer 5

which would be 9x and 21?

Answer 6

y-3x=13
y-3x+3x=13+3x
y+0=13+3x
y=3x+13

Answer 7

Sorry I don't understand how to do this at all :/

Answer 8

Do you know how to solve basic equations?

Answer 9

no

Answer 10

Can you solve this for x?
2x=4

Answer 11

4-2

Answer 12

= 2x

Answer 13

To have x alone you have to divide both sides by 2

Answer 14

2x divided by 2 is x
4 divided by 2 is 2
2x=4 /:2
x=2

Answer 15

Oh thanks :)

Answer 16

Now do this for me:
3x-1=5

Answer 17

Solve for x, make sure it's alone at the end.

Answer 18

3x+3x= 5+3x
0x+ 1 = 5+3x
5+3x=8+1+ 9x ?

Answer 19

3x-1=5 / add 1 to both sides
3x-1+1=5+1
3x+0=6
3x=6 /divide both sides by 3 to have x alone
x=2

Answer 20

Remember that you can't add 2x+3 to have 6x, they are different factors

Answer 21

I don't get it still

Answer 22

On one side you want numbers with x attached to them, on the other just numbers

Answer 23

Do this expression, not an equation this time. Just add those up.
2x+4x+5+7

Answer 24

18

Answer 25

You can only add up numbers with an x, and regular numbers

Answer 26

6x+12

Answer 27

oh

Answer 28

Do another expression:
5x+2-3x+1

Answer 29

8x+3

Answer 30

Notice the minus on the 3x

Answer 31

Algebra 1 is too hard:/

Answer 32

If you want, you can rewrite them, the order doesn't matter in an expression

Answer 33

5x-3x+2+1
2x+3

Answer 34

It's easier to see it that way.

Answer 35

2y-18x=-26

Answer 36

Add 18x to both sides

Answer 37

18x=-26
+18x =18x
0x 34x

Answer 38

then divide 2 to both sides?

Answer 39

its wrong isn't it

Answer 40

2y-18x+18x=-26+18x
2y+0=26+18x
2y=26+18x
now divide by 2, yes.

Answer 41

52 and 17?

Answer 42

If you divide every individual bit by 2, what do you get
2y, 26 and 18x

Answer 43

2y=26+18x /:2
y=13+6x

does that make sense?

Answer 44

not at all

Answer 45

Which is why i wanted to practice some more basic things before we move to the exercises you show me.

Answer 46

ok

Answer 47

In equations, the point is to get the numbers with the x to one side, and regular numbers to the other side.

Answer 48

4x+2=1+3x

Answer 49

To move them around, we need to either add or subtract that same number

Answer 50

For example, to move that 3x with the 4x

Answer 51

We need to subtract 3x from both sides

Answer 52

- 2 to both sides?

Answer 53

oh

Answer 54

4x+2-3x=1+3x-3x

Answer 55

+3x-3x is equal to zero, so it gets cancelled out

Answer 56

4x+2-3x=1

Answer 57

Now we need to move the two, move it for me.

Answer 58

2
-2

Answer 59

4x+2-3x=1
subtract 2 from both sides of the equation

Answer 60

simply add -2 to both sides

Answer 61

2 =3x
-2 -2

Answer 62

4x+2-2-3x=1-2
4x-3x=-1
1x=-1

Answer 63

Also, writing x and 1x is the same.

Answer 64

Let's try another one.

Answer 65

3x+1=2
How would you have 3x alone in here?

Answer 66

-1 to both sides
3x+1=2
3x -1= -1
3x= 0=1
x=4

Answer 67

Remember that you are removing 1 from both sides without changing any numbers, just tuck them in there

Answer 68

3x+1-1=2-1
3x=1

Answer 69

x=1?

Answer 70

Now if you wanted x alone without the 3, you would have to divide both sides by 3

Answer 71

3x divided by 3 is x
1 divided by 3 is a third

Answer 72

\[3x=1\]
\[x=\frac{ 1 }{ 3 }\]

Answer 73

I think i'm starting to get it now

Answer 74

Great :)

Answer 75

5x-4=10-2x

Answer 76

5x -4=10-2x
5x +4= +4-2x
5x +0= 14-2x
5x=0=12

Answer 77

I get the beginning of it I think but idk the ending

Answer 78

5x-4=10-2x
5x-4+4=10-2x+4
you added 4 right?

Answer 79

I did the first time and got 8x

Answer 80

10-8x

Answer 81

There is no need to show that -4+4 is 0, just eliminate it from the start
Reorder the positions so you see what's numbers and what's x's
5x=10+4-2x

Answer 82

5x=14-2x

Answer 83

5x=12x

Answer 84

14 is a number, 2x is an x

Answer 85

we need to move that -2x to the x's side.

Answer 86

In other words, to have 14 alone, we need to find a way how can we have a zero there

Answer 87

If we add 2x it's going to be
14-2x+2x
14-0
14

Answer 88

But since we added 2x, we must also add it on the other side

Answer 89

5x+2x=14-2x+2x
7x=14-0
7x=14

Answer 90

How would you isolate x in here?

Answer 91

divide it by 7x

Answer 92

If you were to divide by 7x, you would get this:
\[\frac{ 7x }{ 7x }=\frac{ 14 }{ 7x }\]
\[1 = \frac{ 2 }{ x }\]

Answer 93

But since we still want x, we only divide by 7.

Answer 94

\[\frac{ 7x }{ 7 } = \frac{ 14 }{ 7 }\]
x=2

Answer 95

Isolate x in here:
3x=9

Answer 96

3

Answer 97

x is indeed equal to 3

Answer 98

2y+3y+8x-3x+1+4