Question

40 years old and 60 years old how many years ago was the ratio of their age is 3 is to 5

Answer 1

Answer:

5/3(40-x)=60-x

((5*40)/3)-((5*x)/3)=60-x

(200/3)-(5x/3)=60-x

common L.C.M

(200-5x)/3=60-x

200-5x=180-3x

200-180=5x-3x

20=2x

x=20/2

x=10 yrs

10 yrs ago there was 3:5

proof

40-x:60-x=3:5

40-10:60-10=3:5

30:50=3:5

3:5=3:5

hence proved....