Question 16997: Matthew is 3 times as old as jenny. In 7 years, he will be twice as old as he will be then. how old is each now. Answer by awang1996(50) (Show Source):
You can put this solution on YOUR website! Matthew is 3 times as old as jenny. In 7 years, he will be twice as old as he will be then. how old is each now.
3j=m
m+7=2(j+7)
3j+7=2j+14
subtract 2j from both sides.
j+7=14
subtract 7 from both sides. j=7
m=21
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