Pls help and explain!! I will give brainliest!

252 in²

Step-by-step explanation:

The figure can be considered as a rectangle with the rectangle on the right to be added on and the rectangle on the left to be subtracted.

Area of rectangle with length 12 and width 15 + 6 = 21 is

A = length × width = 12 × 21 = 252 in²

Since the areas of the 2 rectangles to be added / subtracted are equal

both 6 × 3 = 18 in² , then they can be ignored

Then area of figure = 252 in²

show us the picture

step-by-step explanation:

show the !

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: