Question 1060933
w = width
w + 10 = length   {length is 10 ft longer than the width}


Perimeter of a rectangle = 2(width) + 2(length)


2w + 2(w + 10) = 210   {substituted width and length into perimeter formula}
2w + 2w + 20 = 210   {used distributive property}
4w + 20 = 210   {combined like terms}
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