Question

3(2x - 3) +2 (x+1) = 3x + 18

Answer 1

$3(2x - 3) +2 (x+1) = 3x + 18\to \\\\ 6x-9+2x+2=3x+18\to \\\\ 6x+2x-3x=18+9-2\to \\\\ 5x=25\to \\\\ x= \dfrac{25}{5} \to \\\\ \boxed{x=5}$

Answer 2

3.(2x-3)+2.(x+1)=3x+18
6x-9+2x+2=3x+18
6x+2x-3x=18-2+9
8x-3x=16+9
5x=25
x=25/5
x=5
S={5}