Rectangle C is a special shape because its area is EQUAL to its perimeter. The side lengths of the rectangle are 2x and 7. Solve for x. If your answer is not an integer, write it as a DECIMAL when you type it in.

x = 1.4

Step-by-step explanation:

The area of a rectangle is A = (length)(width), and the perimeter is P = 2(length)+2(width).  Replacing (length) with 2x and width with 7, and equating these two formulas, we get:

A = (2x)(7) = P = 2(2x) + 2(7)

Simplifying through multiplication:

14x = 4x + 14, which simplifies further to:

10x = 14, or x = 7/5, or 1.4

x = 1.4

true

step-by-step explanation:

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.