17 - (-18)

17 - (-18) = 17 + 18 = 35

To subtract a negative number from another number, you can follow these steps:

Step 1: Remember that subtracting a negative number is the same as adding its positive counterpart.

In this case, subtracting a negative 18 is the same as adding positive 18.

Step 2: Perform the addition.

17 + 18 = 35

So, 17 - (-18) is equal to 35.