Question

Two nos are in the ratio 3:5 if each no is increased by 10 the ratio becomes 5:7 the nos are???

Answer 1

let the numbers be x and y
x/y = 3/5 => 5x=3y => 5x-3y=0
x+10/y+10 = 5/7

=> 7x-5y+20 =0

solve both equations for x and y

Answer 2

The nos are x=1.3 & y=2.16