Question

Find x for 3x + 10 = -5 and
find x for 3x - 12 = 9 please help

Answer 1

1.
`x=-5`

2.
`x=7`

Explanation:

First Equation

1. For the first equation,
`3x+10=-5` we need to move all the constants to one side.

`3x+10=-5\\3x=-15`

2. Once that is done, we need to divide both sides by 3 to get
`x` by itself.

`3x=-15\\(3x)/(3)=(-15)/(3)`

3. Now, we have our final answer.

`x=-5`

Second Equation

1. For the second equation,
`3x-12=9` we need to move all the constants to one side.

`3x-12=9\\3x=21`

2. Once that is done, we need to divide both sides by 3 to get
`x` by itself.

`3x=21\\(3x)/(3) =(21)/(3)`

3. Now, we have our final answer.

`x=7`

Hope this helped C:

Answer 2

3x+10=-5

3x=-15

x=-5

3x-12=9

3x=21

x=7