ok so the question is about perimiter
the legnth is 4x-4 and width is -7x (eventhough having a negative dimention is impossible)
so
P=L+L+W+W
P=4x-4+4x-4-7x-7x
we can move terms since it is multiply
P=4x+4x-7x-7x-4-4
add
just add coefients
P=8x-14x-8
P=-6x-8
perimiter=-6x-8 which is illogical
