Question

Calcule as equações
A) -2x= -40
B) 4x= 24
C) 5x= 5+4x
D) 2x-4= 0

Answer 1

a) -2x=40

-2x=40.(-1)

2x=40

x=40/2

x=20

b) 4x=24

x=24/4

x=6

c) 5x=5+4x

5x-4x=5

x=5

d) 2x-4=0

2x=4

x=4/2

x=2