Question

Two numbers are in the ratio 3 is to 4 and if 7 be subtracted from each of the numbers the ratio becomes 2 is to 3 the numbers are

Answer 1

x/y=3/4
(x-7)/(y-7)=2/3
x=3y/4
3x-21=2y-14
3x-2y=7
9y/4-2y=7
y=28
x=21