Question 808110
An aquarium holding African Chiclids is 4 inches higher than it is wide. It's length is 25 inches. It's volume is 8000 cubic inches. 
The question is asking for it's widtth and it's height. 
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width = x
height x+4
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Equations:
25x(x+4) = 8000
25(x^2+4x)-8000 = 0
x^2+4x - 320 = 0
Factor::
(x-16)(x+20) = 0
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Positive solution:
x = 16 inches (width)
x+4 = 20 inches (height)
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Cheers,
Stan H.