Question 983493
 Al is seven years older than Maria. The sum of their ages is 51. What is each of their ages?
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Equations:
a = m + 7
a + m = 51
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Substitute for "a" and solve for "m"::
m+7 + m = 51
2m = 44
m = 22 (maria's age now)
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Solve for "a"::
a = m + 7
a = 22+7
a = 29 (Al's age now)
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Cheers,
Stan H.
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