Question

resolva as equações:
a) -5 (-x-4)= -5
b) 2x-3=7.2 (2x-13)

Answer 1

a) -5.(-x - 4) = -5

5x + 20 = -5

5x = -5 - 20

5x = -25

x = -25/5

x = -5

b) 2x - 3 = 7 . 2.(2x - 13)

2x - 3 = 7 . (4x - 26)

2x - 3 = 28x - 182

2x - 28x = -182 + 3

-26x = -179  .(-1)

x = 179/26