Question

Modeling and Solving a Problem:

Answer 1

The third side is 9 cm long

Let $x$ represent one of the equal sides. Then the` other side will be $2x-5$.

Adding all the length of the sides should give 23. Thus,

$x+x+2x-5=23$

This implies that,

$4x-5=23$

We group like terms and simplify to obtain.

$4x=23+5$

$4x=28$

Divide through by 4 to get

$x=7$

Hence the length of the other side is

$2(7)-5=9$