Question

The width of a rectangular room is 3 feet shorter than it is long. If the perimeter of the room is 42 feet, what is the width of the room? Show work

Answer 1

Should be 9 feet.

Explanation:

Well I just set up the equation 2x + 2(x-3) = 42 Then solved x and subtracted x by 9.

Answer 2

• 9 feet

Explanation:

Let width be w and length be l

Then we have equations below:

• w = l - 3
• 2(w + l) = 42

Substitute l = w + 3 in the second equation and solve for w:

• w + l = 21
• w + w + 3 = 21
• 2w = 21 - 3
• 2w = 18
• w = 18/2
• w = 9 feet