Answer:

Step-by-step explanation:
Given
See attachment for diagram
Required
The equation to find x
First, calculate the area of the big rectangle using:

So:

The smaller rectangle

The difference between this areas give the area of the shaded region.
So:


Open brackets

Collect like terms


<em>The above equation can be used to solve for x</em>
I think the answer is 7.725 so sorry if I’m wrong but see if that answer is correct
Step-by-step explanation:
12:18
12 to 18
12/18 = 2/3