Suppose That The Length Of A Rectangle Is 3inches Longer Than The Width And That The Perimeter Of The Rectangle Is 78,how To Do This Problem?

Parameter is sum of all sides
Here Length = width +3
Let width = w and length = l

w + w + l + l =78
as we know that l=w+3 so equation will become

w + w + (w+3) + (w+3) = 78

4w + 6 = 78

4w = 72

w = 18

So width = 18 and Length = 18+3 = 21 >>>answer

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