SOLUTION: what is a test value to determine whether or not a problem is a solution?

Question 237624: what is a test value to determine whether or not a problem is a solution?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
what is a test value to determine whether or not a problem is a solution?
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If you had the inequality x < -2
a test value could be ANY number.
If you select x = 7 you would substitute that for x and see if you
get a true statement. For example,
7 < -2
That is not true so you would conclude that 7 is not in the solution
set for the inequality.
--
Further, since you might realize that 7 is greater than -2 you
could conclude that ANY number greater than -2 is not in the
solution set.
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Bottom Line: The test number can be ANY number. You substitute it
and see if it works. If it doesn't, it's not in the solution set.
=====================================
Cheers,
Stan H.
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