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If possible evaluate the expression for the given value of the variable.

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We can test if it is possible to evaluate an expression for a given value of a variable by substituting the value into the expression and attempting to find the answer.

If the variable causes a denominator to equal zero, then the expression is undefined for the variable.

If we substitute 2 for x we get:

10/22 - 3(2) - 10

10/4 - 6 - 10

5/2 - 16


It is possible to evaluate the expression for x = 2.  The expression equals -27/2 when x = 2.