Frank is 15 years younger then John. In 5 years John will be
twice as old as Frank. How old will Frank be in four years?
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Answer Posted / mohitkuldeep
let age of frank be x
=> age of john = x + 15
after 5 yrs
age of frank = x + 5
age of john = x + 15 +5 = x + 20
x +20 = 2(x + 5)
=>x = 10
age of frank in 4 yrs = 10 + 4 = 14 yrs
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