Question

a year ago, an adult was five times as old as a child. a year hence the adult will be 4 times as old as a child. find the present ages of the adult and the child

Answer 1

let x and y be adult and child age
x-1=5(y-1)
x-1=5y-5
x-5y=-4--------(1)
one year hence
x+1=4(y+1)
x+1=4y+4
x-4y=3-------(2)
from (1) and(2) we get
y=7 and x=31
There fore age of child is 7years and adult is 31 years.
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Answer 2

this is your answer hope it may helps you