SOLUTION: My sister is 8 years older than I am. Our combined age is half the age of my grandfather. Our grandfather is 68. How old am I ?

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Question 1077521: My sister is 8 years older than I am. Our combined age is half the age of my grandfather. Our grandfather is 68. How old am I ?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
p, Person
s, Sister
68, Grandfather


system%28s=p%2B8%2Cp%2Bs=68%2F2%29

p%2Bs=34
p%2Bp%2B8=34
2p%2B8=34
p%2B4=17
highlight%28p=13%29---------answer's the question.

highlight%28s=21%29