-6 - (-3)

-6 - (-3) = -6 + 3 = -3

To simplify the expression -6 - (-3), we can rewrite it as -6 + 3.

This is because subtracting a negative number is the same as adding its positive counterpart.

So, -6 + 3 is equal to -3.

Therefore, -6 - (-3) simplifies to -3.