SOLUTION: The sum of the ages of Peter and Paul is 21. Peter will be twice as old as Paul 3 years from now. What is the present age of Peter?

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Question 1147145: The sum of the ages of Peter and Paul is 21. Peter will be twice as old as Paul 3 years from now. What is the present age of Peter?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39620) About Me  (Show Source):
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E pEter
A pAul

system%28E%2BA=21%2CE%2B3=2%28A%2B3%29%29

A=21-E
substitute.

E%2B3=2%28%2821-E%29%2B3%29
.
.

Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
.

The condition in grammatically correct English form should be as follows: 

    The sum of the ages of Peter and Paul is 21. In 3 years, Peter will be twice as old as Paul. What is the present age of Peter?


Do you see the difference ?