Question

x+3 (-10+x)=5 (12-2x) -20

Answer 1

Boa tarde

veja:

x + 3(- 10 + x) = 5(12 - 2x) - 20

aplica a distributiva

x - 30 + 3x = 60 - 10x - 20

4x + 10x = 40 + 30

14x = 70

x = 70 / 14

x = 5

Answer 2

x -30 + 3x = 60 -10x -20
4x + 10x = 40 + 30
14x = 70
x = 70/14

x = 5