You divide 18 by 90 and get .2 then multiply it by 100 and get 20. Then you subtract 20 from 100 and get 80. You got 80% correct.
Since you do not want the variable y, you must eliminate 
Therefore, to eliminate it, you must have the opposite of it, making the answer 
Answer: Width = 18m
Length = 32m
Step-by-step explanation:
Let the width of a rectangle be x
Let the length of the rectangle be: x+14
Width = 18m
Length = 32m
Check the attachment for the explanation and further details.
D the answer is D. I know this Bc I did that 2 weeks ago and had 2 test on this and made 100% on both test