SOLUTION: The perimeter of a rectangle is 30m more than three times it's width. If the perimeter is 84m, find the length and width of the rectangle. (Hint: w= 18m)

Question 1169123: The perimeter of a rectangle is 30m more than three times it's width. If the perimeter is 84m, find the length and width of the rectangle. (Hint: w= 18m)
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

let the length be and the width
the perimeter of a rectangle is
if the perimeter of a rectangle is more than times it's , we have

If the perimeter is , then

......substitute known variables

so, the length is and the width is

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