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January 29, 2015

January 29, 2015

Posted by **Precious** on Monday, February 27, 2012 at 10:50am.

- algebra -
**Steve**, Monday, February 27, 2012 at 2:01pmwhat's the problem?

perimeter is the sum of the sides.

Let z be the third side.

x+2 + x-1 + z = 4x+1

z = 4x+1 - (x+2) - (x-1)

z = 4x+1-x-2-x+1

z = 2x

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