SOLUTION: Ten years ago, Jan was four times as old as Michael. Now, he is only twice as old as Michael. How old is Jan?

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Question 812333: Ten years ago, Jan was four times as old as Michael. Now, he is only twice as old as Michael. How old is Jan?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
j - 10 = 4(m - 10)
j = 2m
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j - 10 = 4(m - 10)
2m - 10 = 4m - 40
2m = 30
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m = 15
j = 30
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