Answer:

Step-by-step explanation:
Answer:
L = 100
W = 60
Step-by-step explanation:
2L + 2W = 320
-2L + 2W = -80
4W = 240
W = 60
L - W = 40
L - 60 = 40
L = 100
Well it is true if the problem is the right with the right answer. If not you have a false eqaution.