Question

resolva as equações 
a) x+12=2x-5

Answer 1

A) x + 12 = 2x - 5
x - 2x = -5 -12
-x = -17 .(-1)
x = 17

Answer 2

x + 12 = 2x - 5
x - 2x = -5 - 12
-x = -17                  .(-1)
x = 17