<PRE><B>Question 368753</B>
The inverse number for addition is the opposite number (or negative number). &lt;br&gt;

The number plus its additive inverse always equals zero!&lt;br&gt;

In this case 12+n, you just need to set this equal to zero to find the inverse number.&lt;br&gt;

12+n=0&lt;br&gt;

n=-12&lt;br&gt;

Therefore, the additive inverse of 12 is -12.&lt;br&gt;

You can also just multiply the number by -1 to find the additive inverse.&lt;br&gt;

Thus, the additive inverse of -5 is just 5 &lt;br&gt;

which is  -5*(-1)&lt;br&gt;

I hope this helps!&lt;br&gt;</PRE>