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Step-by-step explanation:
let the common multiple of the radio be x
Harry's age= 7x
Hari´s age = 5x
acc. to sum
therefore their present ages are 28years and 20 years respectively
Hari: 5x
Harry: 7x
4(5x+4)=3(7x+4)
20x+16=21x+12
20x - 21x= 12-16
-x=-4
x=4
Hari=5x=5×4= 20
Harry=7x=7×4=28
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