a) $$\frac{1}{4}x=8$$
$$x=8 \cdot 4$$
$$\boxed{x = 32}$$
в) $$3x-0,6=x+4,4$$
$$3x - x = 4,4 + 0,6$$
$$2x = 5$$
$$x = \frac{5}{2}$$
$$\boxed{x = 2,5}$$
б) $$5x-12,5=0$$
$$5x = 12,5$$
$$x = \frac{12,5}{5}$$
$$x = \frac{125}{50}$$
$$\boxed{x = 2,5}$$
г) $$4x-(7x-2)=17$$
$$4x - 7x + 2 = 17$$
$$-3x = 17 - 2$$
$$-3x = 15$$
$$x = \frac{15}{-3}$$
$$\boxed{x = -5}$$