Question

1- resolva as equações
a) 2(×+6)=4 (×72)
b) 4×+2=18​

Answer 1

a) 2(x+6) = 4(72x)

2x + 12 = 4 . 72x

2x + 12 = 288x

2x - 288x = -12

-286x = -12 (.-1)

x = 12/286

x = 6/143

x ≈ 0,04

b) 4x + 2 = 18

4x = 18 - 2

4x = 16

x = 16/4

x = 4