The sum of ages of a and b at present 50 years while the ratio between their ages after 5 years will be 3:1 what is the present age of a?
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a+b=50
b=50-a
after 5 years
(a+5)/(b+5)=3/1
a+5=3b+15
a+5=150-3a+15
4a=160
a=40
b=50-40
=10
b=50-a
after 5 years
(a+5)/(b+5)=3/1
a+5=3b+15
a+5=150-3a+15
4a=160
a=40
b=50-40
=10
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