You can put this solution on YOUR website! Must there always be a variable involved when solving an inequality?
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Is that rhetorical?
If there's something to be solved, then it has to be unknown.
For example, if the Area is length x width, and the length and width are given and you want to find the area, the area is the "unknown quantity."
You can write Area = ..., or you can save typing by writing A = l*w.
That applies to equations and inequalities.
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An inequality can be 4<7. There's not much to do with that, other than just look at it.
