<PRE><B>Question 250821</B>
In an isosceles triangle, two legs are equal. In this case, we have
(3x+2) = (5x-14). Solve for x.
16 = 2x
8 = x. 
Substitute back into the equation to get the legs = 26.
The perimeter = 84 = a + b + c.
84 = a + 26 + 26
84 = a + 52
32 = a.
The base is 32 cm</PRE>