Question

ALGUEM ME AJUDA URGENTE
a) 20 + 5x = 70 - 5x
b) 2(x + 1) – 12 = 4 + 3(x – 1)

Answer 1

a) 20 + 5x = 70 - 5x

5x + 5x = 70 - 20

10x = 50

x = 50/10

x = 5

b) 2(x + 1) - 12 = 4 + 3(x - 1)

2x + 2 - 12 = 4 + 3x - 3

2x - 10 = 1 + 3x

2x - 3x = 1 + 10

-x = 11 (.-1)

x = -11