SOLUTION: Matthew is 3 times as old as Jenny. In 7 years, he will be twice as old as she will be then. How old is each now?

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Question 268253: Matthew is 3 times as old as Jenny. In 7 years, he will be twice as old as she will be then. How old is each now?
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
Let m represetn mathews age today and j represent jenny's age today
Given
m+=+3j
m%2B7+=+2%28j%2B7%29
m%2B7+=+2j%2B14
Substitute from the first equation
3j+%2B+7+=+2j%2B14
j+=+7
So Jenny is 7
That makes Matthew 3*7 =21