Question

The perimeter of the rectangle below is 132 units. Find the length of side RS.

Write your answer without variables.
S
P
5x
R
4x + 3
Q

Answer 1

Check the picture below.

`(5x)+(5x)+(4x+3)(4x+3)=132\implies 18x+6=132\implies 18x=126 \\\\\\ x=\cfrac{126}{18}\implies x=7\hspace{9em}\underset{RS }{\stackrel{ 5(7) }{\text{\LARGE 35}}}`