Question

x-40+2x-2 = 88 - x +10

Answer 1

x +2x +x = 88+10 +40 +2
4x = 140
x = 140/4
x = 35                    ok

Answer 2

X-40+2x-2 = 88 - x +10
x+2x+x= 88 +10 +40 +2
4x = 98 + 42
4x = 140
x=$\frac{140}{4}$
x = 35