SOLUTION: A rectangular flower bed with the width 12 ft. and length 15 ft. is going to have a walkway of uniform width on all sides. If area of the walkway is 90 sq. ft., how wide is the wal

Question 284241: A rectangular flower bed with the width 12 ft. and length 15 ft. is going to have a walkway of uniform width on all sides. If area of the walkway is 90 sq. ft., how wide is the walkway?
Answer by nyc_function(2741) (Show Source): You can put this solution on YOUR website!
Find x.
Here's another way to solve for x.
Let x = width of walkway
(12 - 2x)(15 - 2x) = total area or 180
180 - 54x + 4x^2 = 180
180 - 180 - 54x + 4x^2 = 0
-54x + 4x^2 = 0
x = 27/2

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