Triangle Third Side

[nycmath]

A triangle has a perimeter of 50. If 2 of its sides are equal and the third side is 5 more than the equal sides, what is the length of the third side?

Setup:

Perimeter = P = 50

First side = x

Second side = First side = x

Third side = x + 5

P = side 1 + side 2 + side 3

50 = x + x + x + 5

Is this the correct equation?

[Eigenvalue]

Yes, the isosceles triangle has side lengths 15,15, and 20.