Answer: Well, Your best answer will be is 35. Here's a Explain. W-5=0 W=5 That's for the width. L=3*5-8 L=15-8=7 And, That's for the length. Here's proof. 35=7*5 35=35 Hope That Helps!~
Honestly, I keep plugging in numbers than adding 8, then multiplying them by the original number and the number i got from adding 8 till I found the answer.
Not the proper way, and I don't suggest this strategy for future use like big numbers, but worked for me
