The equation is n – 8 = 5.

n – 8  + 8 = 5 + 8            (Add 8 to each side)

n = 5 + 8                         (Apply Additive inverse property: 8 – 8 = 0)

n = 13                             (Add:  5 + 8 = 13)

Check:

To check the solution, substitute n = 13 in original equation.

n – 8 = 5 13 – 8 = 5

5 = 5                               (Subtract: 13 – 8 = 5)

The statement is true.

To graph the solution on the number line;

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• First draw the number line
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• Mark a dot at 13 on the number line
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The value of n = 13.