First you need to find the area, the formula is A=LxW, multiply 14 by 11, that’s the area. If one back covers 22 ft we need to find how many 22s are in 154, to do that you divide. Make sense?
Subtract the
terms from each other, then the
terms, then the ones without any
whatsoever.

First, we'll subtract
from 

Result: 
Next, we'll subtract
from 

Result: 
Finally, we'll subtract
from 

Result: 
Now, we can add these 3 results together.
First, we had
, then
, and finally
.
Thus, our subtraction of

equals

C. m k L hope it helps! not 100% sure
It increased just subtract it that u will he’s y answer