Algebra II
posted by Lucy .
Two sides of a triangle are equal in length. The length of the third side is three meters less that the sum of the lengthsof the other two sides.Find the length of the longest side of the triangle if its perimeter is 29 meters.
Please help.
Thanks.

Let each of the two equal sides be x m
"he length of the third side is three meters less that the sum of the lengthsof the other two sides"
translate that into math, does it not become 2x  3 ??
Perimeter means the sum of all 3 sides, so
x + x + 2x3 = 29
Solve and let me know what you got,
see if your answer satisfies the conditions stated in your problem 
4x=32 so x =8.
Thanks,
Lucy