Question

Calcule o valor de x:

A) x/3 = 8/12
B) 2,1/7 = x/10
C) 2/15 = 3/2x

Answer 1

A) x/3=8/12
    12x=24
    x=24/12
    x=2

B)2,1/7=x/10
   21=7x
   x=21/7
   x=3

C)2/15=3/2x
   4x=45
   x=45/4
   x=11,25