Question 938787
Equilateral Triangle
<img src=" http://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Triangle.Equilateral.svg/200px-Triangle.Equilateral.svg.png " />
7x-4 = 2x+11
5x = 15
x = 3
...
each Side is 17 units  {{{2*3+11}}}
..
P = 51 units  {{{3*17}}}