SOLUTION: Four years ago Bob was twice as old as his little sister. Five years from now he will be six years older than his sister. How old

Question 1155934: Four years ago Bob was twice as old as his little sister. Five years from now he will be six years older than his sister. How old is each now?

Found 2 solutions by Boreal, Alan3354:
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Little sister is now x
4 years ago she was x-4 and Bob was 2(x-4), or 2x-8
5 years from now she will be x+5 and Bob will be 2x+1, nine years later
2x+1-6=x+5
x=10
sister is 10 now
when she was 6 Bob was 12, so Bob is now 16
five years from now, he will be 21 and she 15, 6 years older than she
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Four years ago Bob was twice as old as his little sister. Five years from now he will be six years older than his sister. How old is each now?
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The difference in years is always 6.
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Four years ago Bob was twice as old as his little sister. ---> 6 & 12
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etc

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