Asked by Anonymous

seven years ago, Gerry was half as old as Celine is now. In ten years, he will be 4/5 as old as Celine will be. How old are they?
Answered by Hazel
Let g=gerry
c=celine

g-7=1/2(c+7)
g+10=4/5(c+10)

Solve for g and c
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