SOLUTION: Suppose the length of a rectangle is 3 inches longer than the width and that the perimeter of the rectangle is 78. Which I figured that out the length of the rectangle is 21 inches

Question 145162: Suppose the length of a rectangle is 3 inches longer than the width and that the perimeter of the rectangle is 78. Which I figured that out the length of the rectangle is 21 inches and the width is 18 inches. The next question asks "Set up and equation involving only W, the width of the rectangel?" I am not sure what that is asking???
Answer by shahid(44) (Show Source): You can put this solution on YOUR website!
if W is width then length will be W+3 now we know that perimeter is given by formula P=2L+2W
so P=2(W+3)+2W
78=2W+3+2W
78=4W+3 that is the equqtion of W

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