SOLUTION: the perimeter of a rectangle is 144 meters. the length is 3 meters more then twice the WIDTH, FIND THE DIMENSIONS.

Algebra ->  Rectangles -> SOLUTION: the perimeter of a rectangle is 144 meters. the length is 3 meters more then twice the WIDTH, FIND THE DIMENSIONS.      Log On


   

Question 414816: the perimeter of a rectangle is 144 meters. the length is 3 meters more then twice the WIDTH, FIND THE DIMENSIONS.
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

given:
the perimeter P of a rectangle is 144m.
P=144m
the length a is 3m more then twice the WIDTH b
a=2b%2B3m
-------------------
find b
P+=+2a%2B2b
144m+=2%282b%2B3m%29%2B2b
144m+=4b%2B6m%2B2b
144m-6m+=+6b
138m+=+6b
b+=+138m%2F6
b+=+23m.......find a

a=2b%2B3m

a=2%2823m%29%2B3m
a=46m%2B3m
a=49m


check:


144m+=2a%2B2b
144m+=2%2A49m%2B2%2A23m
144m+=98m%2B46m
144m+=144