Question 111253
(3 x width of a window) + (2 x distance to edge of house) 
+ (2 x separation of windows) = 33'
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(2 x separation of windows) = 33 - (3 x width of a window)
+ (2 x distance to edge of house)
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(separation of windows) = (1/2)*(33 - (3 x width of a window) - (2 x distance to edge of house))
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separation of windows = (1/2)*(33 - 3*3 - 2*4)
separation of windows = (1/2)*(33 - 9 - 8)
separation of windows = (1/2)*16
separation of windows = 8' answer
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check
(3 x width of a window) + (2 x distance to edge of house) 
+ (2 x separation of windows) = 33'
3*3 + 2*4 + 2*8 = 33
9 + 8 + 16 = 33
33 = 33
OK