Question

Resolva as equações:a) 5x+12=72 B) x+17=20 C) 4x+8=2x+20

Answer 1

à) 5x+12=72
5x=72-12
5x=60
x=60/5
x=12

b) x+17=20
x=20-17
x=3

c) 4x+8=2x+20
4x-2x=20-8
2x=12
x=12/2
x=6