SOLUTION: Sally is 7 years older than her younger brother Dalton. In 5 years, Dalton's age will be 1/2 of Sally's age. What is Sally's age today?

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Question 1069423: Sally is 7 years older than her younger brother Dalton. In 5 years, Dalton's age will be 1/2 of Sally's age. What is Sally's age today?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
s Sally
d Dalton

system%28s=d%2B7%2Cd%2B5=%28s%2B5%29%2F2%29

2d%2B10=s%2B5
2d=s-5
-
2d=%28d%2B7%29-5
2d=d%2B2
highlight%28d=2%29
-
highlight%28highlight%28s=9%29%29