To find x, we need to first simplify the equation.
3 (x+2)-3+x+17 = 40
Subtract 17 from both sides.
3 (x-2) - 3 + x = 23
Distribute the parenthesis.
3x - 6 - 3 + x
Combine like-terms.
4x -9 = 23
Add 9 to both sides.
4x = 32
Divide both sides by 4.
x = 8.
I hope this helps!
