Question

Who do I do this problem

Answer 1

You subtract 16 from each side of the equation.
Then it will say exactly what number 'n' is.
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The equation is                    n + 16 = 9

On the left side, you subtract 16 from (n + 16) and you have 'n'.

On the right side, you subtract 16 from 9 and you have  -7 .

Now the equation says          n      =  -7