SOLUTION: Bill is 8 times older than Sally the difference in their ages is 7 years; how old is Bill and how old is Sally

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Question 359904: Bill is 8 times older than Sally the difference in their ages is 7 years; how old is Bill and how old is Sally
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
B+=+8S, and B-S+=+7. Then 8S+-+S+=+7 by direct substitution.
7S+=+7, and S+=+1. Bill is 8 years old.