To solve the equation 5,7 - y = 8, we first need to subtract 5,7 from both sides of the equation:

5,7 - y - 5,7 = 8 - 5,7
-y = 2,3

Next, we divide both sides by -1 to solve for y:

y = -2,3

Therefore, the value of y in the equation 5,7 - y = 8 is -2,3.

Now let's simplify the expression 8,755/7 × 3/5 × 2/3:

8,755/7 × 3/5 × 2/3
= (8,755 × 3 × 2) / (7 × 5 × 3)
= 52,530 / 105
= 500

So, 8,755/7 × 3/5 × 2/3 is equal to 500.