Question

Resolva as equação abaixo:

A)12x+150=2x+122
B)5x+20=200
C)x+14+x=206
​

Answer 1

a)

12x + 150 = 2x + 122

12x - 2x = 122 - 150

10x = -28

x = -28/10

x = -2,8

b)

5x + 20 = 200

5x = 200 - 20

5x = 180

x = 180/2

x = 36

c)

x + 14 + x = 206

2x = 206 - 14

2x = 192

x = 192/2

x = 96