Question

a) 2x -2 = 12-5x
b) x-39 = -79
c) 10 = x +8​

Answer 1

a)

2x - 2 = 12 - 5x

2x + 5x = 12 + 2

7x = 14

x = 14/7

x = 2

b)

x - 39 = - 79

x = -79 + 39

x = -40

c)

10 = x + 8

10 - 8 = x

2 = x ou x = 2