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?

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) (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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