4. Решите уравнение:
x+2$$\frac{9}{11}$$=1$$\frac{4}{11}$$+4$$\frac{10}{11}$$
x+2$$\frac{9}{11}$$=5$$\frac{14}{11}$$
x+2$$\frac{9}{11}$$=6$$\frac{3}{11}$$
x=6$$\frac{3}{11}$$-2$$\frac{9}{11}$$
x=5$$\frac{14}{11}$$-2$$\frac{9}{11}$$
x=3$$\frac{5}{11}$$
8$$\frac{5}{27}$$-x=1$$\frac{25}{27}$$+2$$\frac{25}{27}$$
8$$\frac{5}{27}$$-x=3$$\frac{50}{27}$$
8$$\frac{5}{27}$$-x=4$$\frac{23}{27}$$
x=8$$\frac{5}{27}$$-4$$\frac{23}{27}$$
x=7$$\frac{32}{27}$$-4$$\frac{23}{27}$$
x=3$$\frac{9}{27}$$
x=3$$\frac{1}{3}$$
Ответ: 1) x=3$$\frac{5}{11}$$; 2) x=3$$\frac{1}{3}$$