Question 55630
Let y represent the base 
Let x represent the side length
EQUATION:
x+x+y=23
2x+y=23
y=23-2x
EQUATION 2:
2x+2x+y=41
SUBSITUTE FOR Y:
4x+(23-2x)=41
2x=18
x=9
y=23-2(9)
y=5
Hence, the length of the sides are 9 and 2(9)=18cm
Paul.