SOLUTION: My sister is 2 years older than I am. The sum of our ages is 20. Find our ages

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Question 1047277: My sister is 2 years older than I am. The sum of our ages is 20. Find our ages
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

My sister is 2 years older than I am.
so, if your age is x, than sister's age is %28x%2B2%29
if the sum of your ages is 20, than x%2B%28x%2B2%29=20-> solve for x
x%2Bx%2B2=20
2x=20-2
2x=18
x=18%2F2
x=9
now find sister's age
%28x%2B2%29=9%2B2=11
so, your age is 9 and your sister's age is 11