SOLUTION: in 3 more years, Marcy's grandfather John will be six times as old as Marcy was last year. When Marcy's present age is added to her grandfather's present age, the total is 68. How

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Question 1078243: in 3 more years, Marcy's grandfather John will be six times as old as Marcy was last year. When Marcy's present age is added to her grandfather's present age, the total is 68. How old is each now?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
x, Marcy now
y, Grandfather now


in 3 more years, Marcy's grandfather John will be six times as old as Marcy was last year.
y%2B3=6%28x-3%29
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Simplify.
y%2B3=6x-18
y=6x-21



Marcy's present age is added to her grandfather's present age, the total is 68.
x%2By=68




System of Equations: system%28y=6x-21%2Cx%2By=68%29

Solve for x and y.