Please do this one- don't troll I will report :)

-3.7

Step-by-step explanation:

(-y+5.3)+(7.2y-9)=6.2y+n

-y+5.3+7.2y-9=6.2y+n

5.3-9-y+7.2y-6.2y=n

-y+7.2y-6.2y=0 so we will not write the y

n=-3.7

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft