The equation is 

             (Subtract 10 from each side)

                             (Apply Additive inverse property: 10 10= 0)

                                  (Subtract:    )

Check:

To check the solution, substitute  in original equation.

                               (Add: -12 + 10 = -2)

The statement is true.

 Graph the solution on number line.

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• First draw a number line.
\
• Mark a dot at -12 on the number line.
\

The value of m = -12.