Question

The monthly incomes of a and b are in the ratio 4 : 5, their expenses are in the ratio 5 : 6. If 'a' saves rs.25 per month and 'b' saves rs.50 per month, what are their respective incomes?

Answer 1

Step-by-step explanation:

income........A:B=4:5

let common multiple be x......

therefore.....income of A=4x;B=5x

expenses......A:B=5:6

let the common multiple be y

therefore.....expenses of A=5y;B=6y

saving=income-expenses

saving of A = 4x-5y=25

saving of B = 5x-6y=50

NOW SOLVE THE UNDERLINED EQUATIONS BY EITHER ELIMINATION.OR SUBSTITUTION OR BY CROSS MULTIPLICATION