Question

The perimeter of a rectangle is 42 ft. The length is 5 ft. longer than the width. Let x be the length and y be the width.

2x+2y=?
x=y+?

What is the length?
What is the width?

Answer 1

alright, so one way to write the perimeter is 2 times the length of one side plus 2 times the length of the next side for a rectangle, right? So 2x+2y=42

Answer 2

if y is the width and we know that the length (x) is the width plus 5, then x=y+5, right?

Answer 3

because x=y+5, you can take y+5 and put it where x is in the first equation and then solve that one for y, which is the width, remember.

Answer 4

and because the length is y+5, add 5 to what you got for y and you have the length!

Answer 5

Thank You very MUCH!