To solve this equation, we need to find the value of x.

We can start by simplifying the expression inside the parentheses:

2,8 : x = 57,5

To simplify the expression 2,8 : x, we need to divide 2 by 8 and then multiply the result by x.

2 ÷ 8 = 0.25

0.25 * x = 57.5

Now we can solve for x by dividing both sides of the equation by 0.25:

x = 57.5 ÷ 0.25

x = 230

Therefore, the value of x is 230.