Two sides of a triangle have the same length the thrid side measures 5m less than twice the common length the perimeter of the triangle is 19 m what are the lengths of the three sides

Let x = measure of sides that have common length

then from "the third side measures 5m less than twice the common length."

2x-5 = third side

.

Because they gave us the perimeter we have:

11 = x+x+2x-5 11 = 4x-5

16 = 4x

4 m = x

.

third side:

2x - 5 = 2 (4) - 5 = 8-5 = 3m

Length answers:

4m, 4m, and 3m