SOLUTION: Joseph is 3 years younger than twice his sisters age . Joseph is 17 years old . How old is his sister ?

SOLUTION: Joseph is 3 years younger than twice his sisters age . Joseph is 17 years old . How old is his sister ?

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Question 1101627: Joseph is 3 years younger than twice his sisters age . Joseph is 17 years old . How old is his sister ?
Answer by ikleyn(52787) (Show Source): You can put this solution on YOUR website!
.

2*sister = 17 + 3,


2*sister = 20


sister =  = 10.


Answer.  sister is 10 years old.

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