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A triangle with a perimeter of 120. What degree are the three sides?

1/3x + 1/2 = 2(3/4x - 5)

A father is three times as old as the son, and the daughter is 3 years younger than the son. If the sum of their ages 3 years ago was 63 Find the present age of the father

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The age of the older of the two boys is twice that of the younger. 5 years ago it was three times that of the younger. Find the age of each