To solve the equation (-6) + (-9) - 5(-3), we can simplify it step by step:
First, we can apply the negative sign to each negative number within parentheses, as follows:
(-6) + (-9) - 5(-3) = -6 + (-9) + 5(3)
Next, we can simplify the multiplication within parentheses:
= -6 + (-9) + 15
Now, we can add the numbers:
= -6 - 9 + 15
= -15 + 15
Finally, we can calculate the sum:
= 0
Therefore, the solution to the equation (-6) + (-9) - 5(-3) is 0.