SOLUTION: Julie is 3 years younger than twice her sisters age was 6 years ago. What age is her sister now?

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Question 987861: Julie is 3 years younger than twice her sisters age was 6 years ago. What age is her sister now?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +j+ = Julie's age now
Let +s+ = sister's age now
--------------------------
+j+=+2%2A%28+s+-+6+%29+-+3+
+j+=+2s+-+12+-+3+
+2s+=+j+%2B+15+
+s+=+%281%2F2%29%2Aj+%2B+7.5+
The sister is 7.5 yrs older than 1/2 Julie's age now