Question 81682
Okay, to set up a formula for this problem, you do the following:
Let "x" stand for the base.
{{{4x - 8}}} is the equation for one of the legs.
Now, add the sides to find the perimeter.
{{{(4x - 8) + (4x - 8) + x = 29}}}
From there you simplify (combine like terms) and solve to find x.
{{{9x - 16 = 29}}}
(Add 16 to both sides) {{{9x = 45}}}
(Divide by 9 on each side) {{{x = 5}}}
Next, put your answer for x back into your equation for the leg.
{{{4(5) - 8}}}
Simplify.
{{{20 - 8 = 12}}}
The length of one of the equal sides of the triangle is 12.

Goodluck
-weepingwillowcats