SOLUTION: The ages of a parent and child add up to 30years. In 3years times, the parent will be 4 times as old as the child. Fine the current ages of the parent and the child.

SOLUTION: The ages of a parent and child add up to 30years. In 3years times, the parent will be 4 times as old as the child. Fine the current ages of the parent and the child.

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Question 1010229: The ages of a parent and child add up to 30years. In 3years times, the parent will be 4 times as old as the child. Fine the current ages of the parent and the child.
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Call their ages NOW, p and c. Thus
p + c = 30 so we have p = 30 - c
Then
p + 3 = 4(c + 3)
Substitute in and get
30 - c + 3 = 4(c + 3)
33 - c = 4c + 12
21 = 5c
c = 4.2 years
p = 25.8 years
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