9th grade
posted by dayday .
the perimeter of a triangle is 31 cm. sides #1 and #2 have epual length, while side #3 is one centimeter shorter than twice the length of side #1. how long is each side

2x + (2x  1) = 31
4x  1 = 31
4x = 32
x = 8
The sides must be 8, 8, and 15