Question

Resolva as equações:
A) 3x+9=39-2x
B) x/4 = 5
C) x/3 = 2/3
D) x/10 = 1/2

Answer 1

A) 3x+9=39-2x
3x+2x=39-9
5x=30
x=30/6
x=5

B) x/4 = 5
x=5.4
x=20

C) x/3 = 2/3
3x=2.3
3x=6
x=6/3
x=2

D) x/10 = 1/2
2x=1.10
2x=10
x=10/2
x=5