3(x-5) = -33 equals
x = -6.
First, divide both sides by 3. Your problem should look like: x - 5 = -

.
Second, simplify

to 11. Your problem should look like: x - 5 = -11.
Third, add 5 to both sides. Your problem should look like: x = -11 + 5
Fourth, simplify -11 + 5 to -6. Your problem should look like: x = -6, which is your answer.