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The formula for the perimeter of a rectangle is P = 2 (1+w) solve for w.
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The formula for the perimeter of a rectangle is P = 2 (1+w) solve for w.

User Surendher
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2(1+w)=P\ \ \ \ |\text{use distributive property}\\\\2+2w=P\ \ \ \ |-2\\\\2w=P-2\ \ \ \ |:2\\\\\boxed{w=(P-2)/(2)}

User Allan McLemore
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