SOLUTION: Five years ago, peter was twice as old as Greg. If peter is 21 years old now, how old is Greg

SOLUTION: Five years ago, peter was twice as old as Greg. If peter is 21 years old now, how old is Greg

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Question 1113924: Five years ago, peter was twice as old as Greg. If peter is 21 years old now, how old is Greg
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

let's Peter's age be and Greg's
if five years ago, Peter was twice as old as Greg, we have

if Peter is years old now,we have

so, Greg is years old
check:
Peter is and Greg is
five years ago Peter was and Greg was , and you can see that Peter was twice as old as Greg because

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