Posted by anonymous on Friday, October 19, 2007 at 7:04pm.
The length of a rectangle is twice the width. If the length is increased by 4 inches and the width is decreased by 1 inch, a new rectangle is formed whose perimeter is 198 inches. Find the dimensions of the original rectangle.

algebra1  Reiny, Friday, October 19, 2007 at 7:29pm
just translate the "English" into Math
"The length of a rectangle is twice the width" > L = 2w
"If the length is increased by 4 inches" > 2w + 4
"the width is decreased by 1 inch" > w+1
"perimeter is 198 inches" > 2(2w+4) + 2(w+1) = 198
Solve for w, let me know what you got 
algebra1  Reiny, Friday, October 19, 2007 at 7:30pm
typo error, should have been
"the width is decreased by 1 inch" > w1
"perimeter is 198 inches" > 2(2w+4) + 2(w1) = 198 
algebra1  anonymous, Friday, October 19, 2007 at 7:31pm
i got x= 32

algebra1  Reiny, Friday, October 19, 2007 at 7:34pm
correct, so the original width was 32 in and the length was 64 inches.

algebra1  anonymous, Friday, October 19, 2007 at 7:36pm
That is how far I got on my paper, but my teacher says I need to find the new length and width as well. How would I go about doing that?

algebra1  Reiny, Friday, October 19, 2007 at 7:46pm
well, didn't we call the new length 2w+4, put in w=32 to get 68
and didn't we call the new width w1, put in w=32 into that to get 31
check: new perimiter = 2(68)+2(31)
=136+62
=198 !!!! 
algebra1  anonymous, Friday, October 19, 2007 at 7:49pm
Oh,thank you so much so much for your time, i understand now!=)