Question

If one side of a square is represented by 18x – 20 and the adjacent side is represented by 42 – 13x, find the length of the side of the square.

Answer 1

16

Explanation:

A square has same length on all sides.

So, 18x-20=42-13x

18x+13x=42+20

31x=62

x=62/31=2

Now you can substitute x=2 in one of the equations to find the length of the side.

18x-20 = (18*2)-20 = 36-20 = 16