Question

3(x + 2) + 4(x - 5)

Answer 1

7x−14

Answer 2

(3x+6)+(4x-20)
7x-14
Is this what you needed?

Answer 3

First distribute.

You get 3x + 6 + 4x - 20
Now combine like terms
3x + 4x = 7x
and 6 - 20 = -14
So you know have
7x - 14
Now if this was set to equal 0 then you would be solving for x by first
Adding 14 to both sides
7x - 14 = 0
7x = 14
Divide by 7 on both sides and you get
x = 2