Question

Resolva as equações 3+7×=-39 e 5x-3=9-× e 4 (×-3)=×-8 e ×8+2=3 e

Answer 1

A)
7x = -39 -3
7x = -42
x = -42/7
x = -6

B)
5x + x = 9 + 3
6x = 12
x = 12/6
x = 2

C)
4x - 12 = x - 8
4x - x = -8 + 12
3x = 4
x = 4/3

D)
8x = 3 - 2
8x = 1
x = 1/8