What is the length of the plot?

840 meters of wire is required to fence a rectangular plot.  The plot is 180 meters wide.  What is the length?

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To fence in the rectangular plot means to go around the perimeter.

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

x = length

840  = 2(180) + 2x  {substituted 840 in for perimeter and 180 in for width}
840 = 360 + 2x   {multiplied}
480 = 2x   {subtracted 360 from each side}
x = 240   {divided each side by 2}

The length is 240 meters

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