SOLUTION: Mary’s mom is four less than three times Mary’s age. Their combined age is 60. How old are Mary and her mother?

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Question 1166631: Mary’s mom is four less than three times Mary’s age. Their combined age is 60. How old are Mary and her mother?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
m and d, d for daughter
system%28m=3d-4%2Cm%2Bd=60%29

Make the simple and obvious substitution,...