SOLUTION: A girl is now one-fourth as old as her father, and in seven years she will be one-half as old as her father was twelve years ago. Find their present ages.

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Question 121718: A girl is now one-fourth as old as her father, and in seven years she will be one-half as old as her father was twelve years ago. Find their present ages.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
g = girl's age now
f = father's age now
f+=+4g
g+%2B+7+=+%281%2F2%29%2A%28f+-+12%29
g+%2B+7+=+%281%2F2%29%2A%284g+-+12%29
g+%2B+7+=+2g+-+6
g+=+13 answer
f+=+4g
f+=+52 answer
check:
g+%2B+7+=+%281%2F2%29%2A%28f+-+12%29
13+%2B+7+=+%281%2F2%29%2A%2852+-+12%29
20+=+20
OK