Activity › Discussion › Math › Linear Equations › Reply To: Linear Equations
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Let’s denote Anu’s current age as A and Sonu’s current age as S.
Five years ago:
Anu’s age: A – 5
Sonu’s age: S – 5
Given that Anu was thrice as old as Sonu five years ago:
A−5=3⋅(S−5)
after 10 years:
Anu’s age: A + 10
Sonu’s age: S + 10
Given that Anu will be twice as old as Sonu after 10 years:
A+10=2⋅(S+10)
Solve these equations: and you get A=35 years, S=20 years