An elevator warning sign says that it can hold a max of 450kg. You are moving a heavy marble countertop that weighs 395kg out of
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Call the width x. Note that the length is 3x-6. We know that double the width plus double the length is 120, so we write an equation:
If x is 16.5, the width is 16.5, and the length is
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If x is 16.5, the width is 16.5, and the length is