SOLUTION: The sum of the ages of Mike and Dan is 20 years. In four years, Dan’s age will be 3/4 of Mike’s age. How old is Mike now?

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Question 1153945: The sum of the ages of Mike and Dan is 20 years. In four years, Dan’s age will be 3/4 of Mike’s age. How old is Mike now?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of the ages of Mike and Dan is 20 years. In four years, Dan’s age will be 3/4 of Mike’s age. How old is Mike now?
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M + D = 20
D + 4 = (3/4)*(M + 4)
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can you do the rest?