SOLUTION: Jenny is 25 years younger than her mother. Jenny's mom is 25 years younger than her mom. If their ages all add up to 129, how old is Jenny?

SOLUTION: Jenny is 25 years younger than her mother. Jenny's mom is 25 years younger than her mom. If their ages all add up to 129, how old is Jenny?

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Question 716652: Jenny is 25 years younger than her mother. Jenny's mom is 25 years younger than her mom. If their ages all add up to 129, how old is Jenny?
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
LET X BE THE AGE OF THE MOTHER.
X-25=AGE OF JERRY.
X+25=AGE OF MOM'S MOM.
X-25+X+X+25=129
3X=129+25-25
3X=129
X=129/3
X=43 AGE OF MOM.
43-25=18 AGE OF JERRY.
43+25=68 AGE OF MOM'S MOM.
PROOF:
18+43+68=129
129=129
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