2 (L+w) = 270
L + .75 L = 135
1.75 L = 135
L = 135/1.75 etc
the perimeter of a rectangle is 270 meters. find its dimension if the width is 3/4 of its length. <- our teacher gave us that question and whoever gets the correct answer gets extra credit AND I DON'T KNOW HOW TO DO IT HELP
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