SOLUTION: My sister is 2 years older than I am. The sum of our ages is 18. What is our ages?

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Question 661497: My sister is 2 years older than I am. The sum of our ages is 18. What is our ages?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
My sister is 2 years older than I am.
The sum of our ages is 18. What is our ages?
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Equations:
S = I + 2
S + I = 18
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Substitute for "S" and solve for "I":
I + 2 + I = 18
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2I = 16
I = 8 yrs (I's age)
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Solve for "S":
S = I + 2
S = 8 + 2 = 10 yrs (Sis's age)
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Cheers,
Stan H.
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