maths
posted by 654 .
find the dimension of a rectangle with a perimeter of 54 cm if its length is 3cm less than twice its width also find the area of the rectangle

maths 
MathMate
Set up a system of equations:
Let
W=width
L=length
then
Perimeter =
54 = 2(L+W) ...(1)
L=2W3 ...(2)
Solve W by substituting (2) in (1), and hence solve for L.
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