Question

Resolva as equações
a)2 (x - 5) + 4 (x - 1) = 0
b)3 ( 2 x - 1) = -2 ( x + 3)

Answer 1

2 (x- 5) + 4 (x-1) = 0
2x - 10 + 4 (x-1) = 0
2x - 10 + 4x - 4 = 0
2x + 4x = 0 + 10 + 4
6x = 0 + 10 + 4
6x = 14
x = 14/6 ÷ 2 ( para simplificar)
x = 7/3
x = 2,333...

3 (2x-1) = -2 (x+3)
6x - 3 = -2 (x+ 3)
6x - 3 = -2x + (-6)
6x + 2x = +3 -6
8x = -3
x = -3/8
x = -0,375