2) a) 5x-T 6x 6x y x-3 6) 8y-52y-1 10-у; +; 7y 7y 12

2) a) $$\frac{5x-7}{6x} + \frac{2x-8}{6x} = \frac{5x-7+2x-8}{6x} = \frac{7x-15}{6x}$$

Ответ: $$\frac{7x-15}{6x}$$

б) $$\frac{8y-5}{7y} + \frac{2y-1}{7y} - \frac{10-y}{12} = \frac{8y-5+2y-1-10+y}{7y} = \frac{11y-16}{7y}$$

Ответ: $$\frac{11y-16}{7y}$$