SOLUTION: Gia is 4 years younger than her sister Joy. The sum of their ages is 74. How old is Joy?
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Question 1100538: Gia is 4 years younger than her sister Joy. The sum of their ages is 74. How old is Joy?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Joy is x
Gia is x-4
add to 74
x+x-4=74
2x-4=74
2x=78
x=39
Joy is 39, Gia 35, and that adds to 74.
Joy is 39 ANSWER
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