Question

x/2+6=x-9
qual resposta?

Answer 1

x/2 + 6 = x - 9
x/2 = x - 9 - 6
x/2 = x - 15
x = 2.(x-15)
x = 2x - 30
x-2x = -30
-x = -30 (-1)
x = 30