Question

Resolva a equação x - x/5 - 28 = x/3 *

a}10
b}15
c}18
d}20
e}21

Answer 1

x-x/5-28=x/3

15x-3x-420/15=5x/15

12x-420=5x

12x-5x=420

7x=420

x=420/7

x=60


Verificando temos que :

60 -60/5 -28= 60/3

60 - 12 -28 = 20

48-28=20

20=20