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Mark is 8 years younger than gerry . In ten years, he will be ten years more than one-half as old ad gerry. Find their present ages.

Sagot :

Jers15viz
x=gerry
x-8=mark

x-8+10=1/2(x+10)+10
2[x+2=1/2x+5+10]
2x+4=x+15
x=11

Gerry is 11 and mark is 3