SOLUTION: A leather coin purse has the shape of a triangle. two sides are equal in length and the third side is 3 centimeters shorter than one and one-half times the lenght of the equal side

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Question 449357: A leather coin purse has the shape of a triangle. two sides are equal in length and the third side is 3 centimeters shorter than one and one-half times the lenght of the equal sides. the perimeter is 28.5 centimeters. what are the lengths of the sides?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
P=S+S+1.5S-3
28.5=3.5S-3
3.5S=28.5+3
3.5S=31.5
S=31.5/3.5
S=9 CM IS THE LENGTH OF THE EQUAL SIDES.
1.5*9-3=10.5 CM FOR THE THIRD SIDE.
PROOF:
28.5=9+9+10.5
28.5=28.5