The first to solve x, because it eliminates y. Third one to solve y, because it eliminates x.
A rectangle with sides 15 and w has perimeter

We want this quantity to be at most 50, so it must be less than or equal to 50:

For the record, this implies that

So, the width can be at most 10.
4.3333333 :) hope this helps??
The Answer Would Be 90000.