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perimeter=2 times length + 2 times width. if the peremiter is 20 and the length was 4, you would do 20=2(4)+2(w) and then 20=8+2w and then subtract 8 from both sides of the = sign. 12=2w and divide both sides by 2 so 6=w. in this case, the width would be 6. hope this helped!

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Q: If you know perimeter and length how do you find width?
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