SOLUTION: Bill is 5 times as old as his sister. Bill’s age plus his sister's age adds up to 15. Set up a system using x for Bill’s age and y for his sister’s age. Solve the system.

Question 1154301: Bill is 5 times as old as his sister. Bill’s age plus his sister's age adds up to 15.
Set up a system using x for Bill’s age and y for his sister’s age.
Solve the system.
Answer by josgarithmetic(39621) (Show Source): You can put this solution on YOUR website!
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Set up a system using x for Bill’s age and y for his sister’s age.
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Better:
x for his sister
and
y for Bill
That assigning would make better sense.

If you feel you must follow the instructions exactly in your exercise as it is written, then simply switch the x and y variables.
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