5.544. Решите уравнение: :a) а) (2 (2-6) - 6) = 3; б) 3 1 1 1 7 4 4 4 =- y

a) $$(z - 6) \cdot \frac{3}{7} = 3$$

$$z - 6 = 3 : \frac{3}{7}$$

$$z - 6 = 3 \cdot \frac{7}{3}$$

$$z - 6 = 7$$

$$z = 7 + 6$$

$$z = 13$$

Ответ: 13

б) $$\frac{1}{4}y - \frac{1}{4} = \frac{1}{4}$$

$$\frac{1}{4}y = \frac{1}{4} + \frac{1}{4}$$

$$\frac{1}{4}y = \frac{2}{4}$$

$$y = \frac{2}{4} : \frac{1}{4}$$

$$y = \frac{2}{4} \cdot \frac{4}{1}$$

$$y = 2$$

Ответ: 2