To solve this equation, we will first simplify the expression on the left side:

4(1/2x+4,2)-3,4
= 4(x/2+4)-3.4
= 4*(x/2+4)-3.4
= 4x/2 + 16 - 3.4
= 2x + 16 - 3.4
= 2x + 12.6

Now we can set this expression equal to 40 and solve for x:

2x + 12.6 = 40
2x = 27.4
x = 27.4/2
x = 13.7

Therefore, the solution to the equation is x = 13.7.