SOLUTION: The sum of the persentage age of a father and his daughter is 42 years.7 years later, the father will be three times older than the daughter. the present age of the daughter is?
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Question 996285: The sum of the persentage age of a father and his daughter is 42 years.7 years later, the father will be three times older than the daughter. the present age of the daughter is?
You can put this solution on YOUR website! The sum of the present age of a father and his daughter is 42 years.
f + d = 42
f = 42 - d
7 years later, the father will be three times older than the daughter.
f + 7 = 3(d + 7)
f + 7 = 3d + 21
f = 3d + 21 - 7
f = 3d + 14
Replace f with (42-d)
42 - d = 3d + 14
42 - 14 = 3d + d
28 = 4d
d = 28/4
d = 7 yrs is the present age of the daughter
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You can check the solution yourself, find f and use these ages in the 2nd statment
