Question

Two number are in the ratio of 5:7.

When 3 is added to each number. The new ratio becomes 3:4. Find the numbers.​

Answer 1

`(5x+3)/(7x+3)=(3)/(4)\\\\  4*(5x+3)=3*(7x+3)\\\\20x+12=21x+9\\\\20x-21x=9-12\\\\-x=-3\\\\x=3\\\\5x=5*3=15\\\\7x=7*3=21\\\\`

Explanation: