Question

A) 2×=28
B) 5.x=125
C) 7x + 7=× - 2
D) 5× +3=-2
E) 12x=144

Answer 1

2x = 28
x = 28 / 2
x = 14

b)5x = 125
x = 125 / 5
x = 25

c)7x - 7 = x - 2
7x - x = +7 -  2
6x = 5
x = 1.2

d) 5x + 3 = -2
5x = -3 - 2
5x = -5
x = 5 / - 5
x = -1

e)12x = 144
x = 144 / 12
x = 12

Espero ter ajudado.
Bons estudos.

Answer 2

a) 2x = 28
x = 28/2
x = 14

b) 5x = 125
x = 125/5
x = 25

c) 7x + 7 = x - 2
7x - x = - 2 - 7
6x = - 9
x = - 9/6 simplificando por 3
x = - 3/2

d) 5x + 3 = - 2
5x = - 2 - 3
5x = - 5
x = - 5/5
x = -1

e) 12x = 144
x = 144/12
x = 12