I will do ONE for you...they are all similar....
3(2x-7) - 5x - 2x = 17 Use distibutive law to expand
6x - 21 - 5x - 2x = 17 Collect 'like' terms
(6x-5x-2x) - 21 = 17 Simplify
-x - 21 = 17 Add 21 to both sides
-x = 38 Multiply both sides by -1
x = -38