
Tim T. answered 04/08/19
Math: K-12th grade to Advanced Calc, Ring Theory, Cryptography
Greetings! Lets solve this !
Let the perimeter of a rectangle be P = 2l + 2w
Since the Perimeter is 86 centimeters and the length = 3x and the width = x, the perimeter is
2(3x) + 2(x) = 86
6x + 2x = 86
8x = 86
x = 10.75
Then, the length is 3(10.75) = 32.25 centimeters and the width = 10.75 centimeters
I hope this helped!