Question

A=x/5 =240
B=x/12=240
C=x/20

Answer 1

a) $\frac{x}{5}$ = 240
     x = 240 . 5
     x = 1.200

b) $\frac{x}{12}$ = 240
    x = 240 . 12
    x = 2.880

c) $\frac{x}{20}$