A man is thrice as old as his son.Five years ago the man was four times as old as his son.Find their present ages.
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Let mans age be x
Let sons age be y
x=3y
x-3y=0__________(1)
Five years ago
x-5=4(y-5)
x-5=4y-20
x-4y=-15________(2)
(2)-(1)
-y=-15
y=15
therefore x=3×15=45
x=45 , y=15
Let sons age be y
x=3y
x-3y=0__________(1)
Five years ago
x-5=4(y-5)
x-5=4y-20
x-4y=-15________(2)
(2)-(1)
-y=-15
y=15
therefore x=3×15=45
x=45 , y=15
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