Linear eqautions, how to break down and what does the bracket mean

6 (2x-3).5 = 2x + 4

They aren't brackets, they're parentheses. Careful not to confuse them because they aren't the same. The parentheses mean to distribute, so the 2x-3 would become 12x-18 multiply that by. 5 and you get 12x-9=2x+4 then subtract the 2x from the 12x, and add the - 9 to 4 you should end up with 10x=13. Divide, and the answer is x=1.3