40 is the width
a=(l)(w)
2400 = 60w
2400 = w
——— ——
60 60
this cancels the 60 out
2400 divided by 60 = 40 so therefore
40=w
To solve, I used a very simple method. 30$ + .30a. In this case, 200 would be a. Multiply .30 by 200 and you get 60, aka $60. Then add 30 and you get $90. 90 > 60, meaning that A would be the better deal
