SOLUTION: Sarah's age is five less than twice her sister's age. Sarah is 15 years old. Can you help me set this problem up?

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Question 317292: Sarah's age is five less than twice her sister's age. Sarah is 15 years old. Can you help me set this problem up?
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
S=sarah age
T=sister age
S=2T-5
S=15
15=2T-5 add 5
20=2T divide by 2
10=T