The present age of A and B arw in the ratio 5:6 three years ago their ages were in the ratio 4:5 find the present age
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let the present age of A be 5x years and B be 6x years
before 3 years
5x-3/6x-3 = 4x/5x
by cross multiplication
(5x-3) 5 = (6x-3) 4
25x-15 = 24x-12
x = 3
present age of A = 5*3
= 15 years
present age of B = 6*3
= 18 years
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