Question 451585
Let's be x cm, one from the two equal sides of the isosceles triangle, since its perimeter is 104 cm and the longest side is 2x-12, we write the equation:

2x+(2x-12)=104 => 4x=116 => x=29.

Answer:The two equal sides are 29 cm each, and the long side is 2*29-12=46 cm.