SOLUTION: if the perimiter of the rectangle is 60 and the width is 12 what is the length?

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Question 332464: if the perimiter of the rectangle is 60 and the width is 12 what is the length?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let the length be l
width is 12
perimeter = 2*(l+w)
60=2*(l+12)
divide by 2
60/2 = 2*(l+12) / 2
30=l+12
add -12
30-12=l+12-12
18=l the length.
..
Check
18+18+12+12=60