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The ratio of incomes of two persons is 9:7 and the ratio of their expenditures is 4:3,Ieach of them manages to save 2000 per month, find their monthly income |
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Answer» Let their salaries be 9x and 7xlet their expenditure be 4y and 3yso,ATQ9x-4y=2000—(1)7x-3y=2000—(2)so,from (1)x=(2000+4y)/9—(3)put x in (2)7[(2000+4y)/9]-3y=2000(14000+28y)/9-3y=2000(14000+28y-27y)/9=2000y+14000=18000y=4000 now put y in (3)x=(2000+4×4000)/9x=(2000+16000)/9x=18000/9x=2000 so,salary of first person=9×2000=Rs.18000 salary of second person=7×2000=Rs.14000 |
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