The length of a rectangle is 5 inches less than 3 times the width. The perimeter of the rectangle is 14 inches. Find the length and width of the rectangle.

Question

I did this: Length 3x-5; width 3x
Then I did guess and check and came up with X=2 solving the problem with a perimeter of 14. But, the answer is supposed to be length 4inches, width 3inches.

Please explain what I did wrong. I know the answer but not how to get it.

Answer 1

P = 2L + 2W

14 = 2(3W - 5) + 2W

14 = 8W - 10

24 = 8W

3 = W

Answer 2

Ok, I get it now. Thank you.

Answer 3

:-)

You're welcome.

Answer 4

ok say if the hight is 6in and the length is 10 and it = 240 is the volume then what is the width