Question

The monthly income of aryan and babban are in the ratio 3:4 and their monthly expenditures are in the ratio 5:7. if each saves rs 15000 per month, find their monthly incomes using matrix method. this problem reflects which value

Answer 1

Lets assume that the monthly income and expenditure of the two person be 
x and y 
now according to the question
3x-5y=15000
4x-7y=15000

12x-20y=60000
12x-21y=45000

y=15000
x=30000

Answer 2

Hi friend!!

Let the monthly income of Aryan be 3x

Monthly income of baban be 4x

Monthly expenditures of Aryan be 5y

Monthly expenditures of babban be 7y

If each saves 15000per month

Mathematically,it will be denoted by
3x-5y=15000
4x-7y=15000

By solving, we get x=30000 and y=15000

Therefore monthly income of Aryan is 90000
and babban is 120000

I hope this will help u ;)