Let's simplify the given expression step by step:

2, 3 + 4, 3
= 5.3

3:3, 4 + 2, 7
= 1.3 + 2.7
= 3 + 14
= 17

x - 4, 3x + 6, 8x = 6, 7
Since the equation is not clear, let's simplify it by combining like terms:

x - 4 + 3x + 6 + 8x = 6 + 7
= 12x + 2 = 13
= 12x = 11
= x = 11/12

So the final answer is x = 11/12.