Question

Equações sendo v=Q
2 ( 3 - x) = 3 ( x- 4) +15

Answer 1

2(3-x) = 3(x-4)+15
6-2x = 3x-12+15
-2x-3x = -6+3
-5x = -3
x = 3/5

Tirando a prova:

2(3-3/5) = 3(3/5-4)+15
2(15-3/5) = 3(3-20/5)+15
2.12/5 = 3.(-17/5)+15
24/5 = -51/5+15
24/5 = -51+75/5
24/5 = 24/5

Answer 2

2(3-x)=3(x-4)+15
6-2x=3x-12+15
-2x-3x=-12+15-6
-5x=+3x=3/5