Question

if a classroom has a length that is 5 feet a less than 2 times of its width and it's perimeter is 80 feet. find which the length of the classroom.​

Answer 1

Step-by-step explanation:

If a classroom has a length that is 5 feet less than two times its width and its perimeter is 80 feet,find width and length of the classroom?

Answer by vheroli(126) (Show Source): You can put this solution on YOUR website!

Formulas:

P= 2L + 2W

L= 2x - 5

W= x

Solution:

80 = [ 2(2x-5) ] + 2(x) :Simplify

80 = (4x-10) + 2x : Simplify

80 = 6x - 10 : Simplify

80 + 10 = 6x

90 = 6x : Solve

Answer 2

Answer:

8

Step-by-step explanation:

Feet — 5x

width— 2x

Perimeter — 80 feet

Perimeter of class room — 2(l+b)

80 feet. — 2 (5x+2x)

80 feet. — 2 X 7x

80feet. —14x

80/14. —x

5 —x

Answer—. length — 5 feet