HELP ASAP!! Justify the answer to the equation by explaining the steps you took.

step 1 2x-6=5x+18 - given
step 2 2x-6-5x=5x+18-5x - ???
step 3 -3x-6=18 - ???
step 4 -3x-6+6=18+6 - ???
step 5 -3x/-3=24/-3 - ???
step 6 x=-8 - ???