Write as an equation..

Question

Write as an equation: The sides of a rectangle are x and (x−4). The perimeter is 87.

Answer 1

the formula for a rectangle is:

P = 2L + 2w (the perimeter is the two lengths and two widths added together)

P = 87

L = x

w = x - 4

 

Plug in the values for the variables:

87 = 2x + 2(x - 4)

 

From here, you can distribute and/or solve for x as need be.