Question

The perimeter (distance around the shape) of a rectangle is 40 cm. The length is 14 cm.

Let x = width of the rectangle.

Ravi says he can find the width using the equation 2(x + 14) = 40.
Fran says she can find the width using the equation 2x + 28 = 40.

Answer the questions to solve the equations and to compare the steps and solutions.

What is the value of x in Fran's equation, 2x + 28 = 40?

Answer 1

x=6

Explanation:

You can take 40-28= 12

So that means 12+28=40

Now since it's taking 2 times x, and we're trying to figure out x, you take 12 divided by 2, and that'll equal 6.

6x2=12

12+28=40