SOLUTION: The length of a rectangle is(x+5) and its width is (x-3). Find the value of x if the perimeter of the rectangle is 40cm. (P=21+2w)

Question 919705: The length of a rectangle is(x+5) and its width is (x-3). Find the value of x if the perimeter of the rectangle is 40cm. (P=21+2w)
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

     .

P = 2L + 2w

2(x+5) + 2(x-3) = 40cm

4x = 36

x = 9cm

L = 14cm   and w = 6cm 

and...checking

P = 28cm + 12cm = 40cm 

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