-4 < 9
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Without an inequality sign it can't be considered to be an equation but it can be simplified to: 4-2a
That is called an inequality.
a statement that two quantities are unequal, indicated by the symbol I found this at http://dictionary.reference.com/browse/inequality
9+0=9
9 - 1 - 4 = 4 Literal interpretation of the question would lead me to: 4 < 9 - 1 4 < 8 True as an inequality.