Question 1012320
Two years ago Mark was three times as old as Mia.  This year he is twice as old. Is that possible? If so, how old is MArk? How old is Mia?
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K = Mark's age now
M = Mia's age now
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K-2 = 3(M-2)
K = 2M
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Sub for K
2M-2 = 3(M-2) = 3M-6
Add 6
2M+4 = 3M
Subtract 2M
4 = M
M = 4