Question

the perimiter of a rectangle is 70 inches the legneth of the rectangle is 5 less than 3 times the width of the rectangle what is the width of the rectangle

Answer 1

The width would be 10 inches.

Explanation:

To find this, start by labeling the width of the rectangle as x. Now we can express the length as 3x - 5. Now use the perimeter formula and the known perimeter to find x (which is the width).

2l + 2w = P

2(3x - 5) + 2x = 70

6x - 10 + 2x = 70

8x - 10 = 70

8x - 80

x = 10

Answer 2

Width = 10 inches

Explanation:

Perimeter = 2 [Length+Breadth] PR = 2 [L+B]

Given : L = 3B - 5 , PR = 70

PR = 2 [L+B]

PR = 2 [(3B - 5) + B]

70 = 2 [4B - 5]

70 = 8B - 10

80 = 8B

B = 10