Part A: first multiply 2 by x and -3 → combine all like terms → Add 6 on both sides → subtract 6x from both sides. 
Your final answer should be -5
step by step: 4x + 2(x-3) = 4x + 2x - 11
 4x +2x -6 = 4x + 2x - 11
 6x -6 = 6x - 11
 6x = 6x -11 +6
 6x = 6x -5
 6x-6x= -5 
 0 = -5 
Part B: Add all like terms. 
Hope this helps! :)