Question

-4+5x+7(x-2)=20-2(x-1) resolução

Answer 1

-4 + 5x +7 (x-2) = 20 - 2 (x-1)
5x + 7x  -14 - 4 = 20 -2x + 2
12x - 18 = -2x + 22
12x + 2x = 22 + 18
14x = 40
x = 40 /14     ÷2
x = 20 / 7 

Resposta : x = 20/7