Question 847024
The son is 21 years younger than the mother.  In six years she will be five times as old as him. What age will the son be?
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s = m - 21  ******* Always 21 yrs difference
5(s + 6) = m + 6  *****  6 yrs from now
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5s+30 = m+6
Sub for s
5(m-21) + 30 = m+6
5m - 75 = m + 6
4m = 81
m = 20.25
Makes the son's present age negative.
Not a good problem.