The ratio of income of a to that of B is 7:5 and the expenditure of A to that of B is 3:2. If , at the end of the year , each saves tk.500, find the income of A.

The ratio of income of a to that of B is 7:5 and the expenditure of A to that of B is 3:2. If , at the end of the year , each saves tk.500, find the income of A. Correct Answer tk.3000

ধরি, A এর আয় 7x এবং ব্যয় 3y B এর আয় 5x এবং ব্যয় 2y 7x - 3y = 500........ (1) 5x - 2y = 500.......(2) 7x - 3y = 5x - 2y 2x = y (1) 7x - ( 3 × 2x) = 500 x = 500 A এর আয় = ( 7 × 500) = 3500
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