Homework Help: algebra

Posted by Anonymous on Tuesday, March 29, 2011 at 11:29am.

Two sides of a triangle have equal length. The third side is seven inches shorter. How long are the three sides if the perimeter is 23 inches?

algebra - Ms. Sue, Tuesday, March 29, 2011 at 11:33am
Let x equal the two sides of equal length.

2x + (x - 7) = 23
3x - 7 = 23
3x = 30
x = 10

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