\"\"\"\"

\

The inequality is \"\"

\

\"\"                 (Add: \"\")\"\"

\

Apply subtraction property of inequality: Subtract 20 from each side.

\

\"\"

\

\"\"           (Apply Additive inverse property: \"\")

\

\"\"                 (Apply Additive identity property: \"\")

\

\"\"                          (Subtract: \"\")

\

Graph the solution set on a number line.

\

\"number

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Note: A dot means that this point is included in the solution set.

\

\"\"

\

Check:

\

To check, substitute a number greater than or equal to 10 in inequality. \ \

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\"\"           (Substitute \"\")

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\"\"                           (Add: \"\" )

\

The inequality is true. 

\

\"\"

\

The inequality solution is \"\".