Question 664621
Jan is as old now as Gary was 15 years ago. Six years from now, Gary will be twice as old as Jan will be then. How old is Gary now?
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Equations:
j = g-15
(g+6) = 2(j+6)
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Substitute for "j" and solve for "g":
g+6 = 2(g-15+6)
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g+6 = 2g - 2*9
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g+6 = 2g-18
g = 24 (Gary's age now)
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Solve for "j":
j = g-15
j = 24-15 = 9 (Jan's age now)
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Cheers,
Stan H.