evaluate n+(-12) for each value of n. n=15

plug in n for 15

15+(-12)

which is the same thing as:

15-12 = ?

To evaluate the expression n + (-12) for a given value of n, simply substitute the value of n into the expression and perform the addition.

In this case, the given value of n is 15. So, we substitute 15 into the expression:

15 + (-12)

To add a positive number and a negative number, we subtract the absolute value of the negative number from the positive number:

15 - 12

Performing the subtraction:

15 - 12 = 3

Therefore, when n is equal to 15, the value of n + (-12) is 3.