To solve this equation, we need to simplify both sides and isolate the variable x.

First, let's simplify the expression inside the parentheses on the left side:

4,6 - x = 4,6 - x

Now, let's substitute this simplified expression back into the original equation:

1,7 - (4,6 - x) = 6,6

1,7 - 4,6 + x = 6,6

Next, let's combine like terms on the left side:

-2,9 + x = 6,6

Now, let's isolate the variable x by subtracting -2,9 from both sides:

x = 6,6 + 2,9

x = 9,5

Therefore, the solution to the equation is x = 9,5.