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Let the initial income of the man be Rs. '20x' and initial expenditure of the man be Rs. '8y'. New income of the man = 20x X 1.25 = Rs. '25x' New expenditure of the man = 8y X 1.125 = Rs. '9y' ATQ; 20x - 8y = 4800 ......... (I) 25x - 9y = 8400 .......... (II) On subtracting 5 X equation (I) from 4 X equation (II), we have; 100x - 100x - 36y + 40y = 33600 - 24000 Or, 4y = 9600 So, y = 2400 So, 20x - 8 X 2400 = 4800 Or, 20x = 4800 + 19200 Or, 20x = 24000 So, x = 1200 So, new income = 1200 X 25 = Rs. 30,000
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