Question

encontre o valor de X

A)5X+40()3X+100
B)5X+60()2X+90
C)60X+30()3X+90
D)4X+20()2X+30
E)3X+40()2X+120​

Answer 1

Resposta:

A)5x+40=3x+100

5x-3x=100-40

2x=60

x=60÷2

x=30

B)5x+60=2x+90

5x-2x=90-60

3x=30

x=30÷3

x=10

C)60x+30=3x+90

60x-3x=90-30

57x=60

x=60/57

D)4x+20=2x+30

4x-2x=30-20

2x=10

x=10÷2

x=5

E)3x+40=2x+120

3x-2x=120-40

x=80