SOLUTION: Roger's age is two times the age of his sister. last year his age was three times the age of his sister. How old is Roger?

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Question 800119: Roger's age is two times the age of his sister. last year his age was three times the age of his sister. How old is Roger?
Answer by mhel12jhane(6) About Me  (Show Source):
You can put this solution on YOUR website!
roger 2(x)-1
sister x-1
2x-1=3(x-1)
2x-1=3x-3
2x-3x=-3+1
-x=-2
x=2
roger is 4years old at present and 3 years old last year