math,help

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can someone set this up for me as an equation so i can solve it. thanks

A garden area is 30ft long and 20ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft^2, what is the width of the path.

see the frame question.

if you don't mind i will and give you the answer if i can.30x20ft=__________
400x2 if 800 i think.do you have you math book with you?If you do look in the back and look selected answers then look at chaper number 1-12 and the like for example 10-4 the look at problem number and get the answer that way

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241=square of pie? I don't get it!

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