To solve this equation, we will first simplify each side separately:

66,800 - (x - 1,300)

66,800 - x + 1,300

= 68,100 - x

25.367(65,6879 - у) + 19,4750

25.367 * (65,6879 - у) + 19,4750

= 1,668,173.293 - 25.367у + 19,4750

= 1,686,923.293 - 25.367у

48,4646(x + 14,4002000) - 5,2746643

48,4646 * (x + 14,4002000) - 5,2746643

= 48,4646x + 696,855.2 - 5,2746643

= 48,4646x + 691,580.557

Now, we have the equation:

68,100 - x = 1,686,923.293 - 25.367у + 691,580.557

To solve for x and y, we can combine like terms and isolate each variable:

-x = 1,686,923.293 - 25.367у + 691,580.557 - 68,100

-x = 2,381,403.85 - 25.367у

x = -2,381,403.85 + 25.367у

This equation gives us the relationship between x and у based on the given values.