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posted by Kearra on Sunday, September 26, 2010 at 8:12am.

Two sides of a triangle are x + 2cm and 2x-3cm. If the perimeter is 5x + 7cm, what is the third side?

5x + 7 -(x+2) - (2x-3) = 5x + 7 - x - 2 -2x +3 = 2x + 8

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