SOLUTION: The length of a rectangle is 3 in. more than its width. The perimeter is 30 in. Write and solve the equation to find the width of the rectangle. Formula is P=2 x length + 2 x width

Question 162904: The length of a rectangle is 3 in. more than its width. The perimeter is 30 in. Write and solve the equation to find the width of the rectangle. Formula is P=2 x length + 2 x width
Please show all work.
Thanks
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
Let w = width of rectangle
then because "length of a rectangle is 3 in. more than its width" we have
w+3 = length of rectangle
.
Plugging all the information into:
P=2 x length + 2 x width
we get
30 = 2(w+3) + 2x
dividing both sides by 2:
15 = w+ 3 + x
15 = 2w + 3
12 = 2w
6 inches = w (width)

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