the present ages of two persons are in ratio 6:7. 18 years ago they were in the ratio pf 15:19.find their present ages
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Let the name of the persons be a A and B.
Let the present age of the person A be 5x and B be 7x.
18 year ago the ratio of their age was 8:13.
=5x -18 ÷ 7x-18 = 8 ÷13
=8 (5x - 18) = 13(7x -18)
=40x - 144 = 91x -234
=-144+234 =91x-40x
= 90 =51x
=x =90÷51
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