Question

The length of a rectangle is 3 inches more than its width, and its perimeter is 22 inches. Find the width of the rectangle.
a)4 in.
b)5 in.
c)7 in.

Answer 1

So l+3=w, and 2l+2w=22, if l= length and w=width. Following?

Answer 2

yeah

Answer 3

So simplify 2l+2w=22 by dividing each term by 2 and get l+w=11

Answer 4

Then subtract w from both sides and get l=11-w

Answer 5

Now you know what l is, so just plug it into the other equation.

Answer 6

You get (11-w)+3=w and simplify to get -w+14=w

Answer 7

Simplify and get w=7

Answer 8

So your answer is c, 7.

Answer 9

ok thanks! :)