Perimeter of a rectangle is 372 yards. If the length is 99 yards, what is the width?

Perimeter of a rectangle is 372 yards. If the length is 99 yards, what is the width?

The perimeter P of a rectangle with length l and width w is:
2l + 2w = P

We're given P = 372 and l = 99, so we have:
2(99) + 2w = 372
2w + 198 = 372

Step 1: Group constants:
We need to group our constants 198 and 372. To do that, we subtract 198 from both sides
2w + 198 - 198 = 372 - 198

Step 2: Cancel 198 on the left side:
2w = 174

Step 3: Divide each side of the equation by 2
2w/2 = 174/2
w = 87