2. Решите уравнение: a) 3,69 : y = -1,83 б) x * (-2,3) = -46 в) 7/9*y + 11/12 = 13/18

a) 3,69 : y = -1,83
y = 3,69 : (-1,83)
y = -2,01639344262
y = -2,02

б) x * (-2,3) = -46
x = -46 : (-2,3)
x = 20

в) $$\frac{7}{9}y + \frac{11}{12} = \frac{13}{18}$$
$$\frac{7}{9}y = \frac{13}{18} - \frac{11}{12}$$
$$\frac{7}{9}y = \frac{26}{36} - \frac{33}{36}$$
$$\frac{7}{9}y = -\frac{7}{36}$$
y = -\(\frac{7}{36}\) : \(\frac{7}{9}\)
y = -\(\frac{7}{36}\) \(\cdot\) \(\frac{9}{7}\)$$
y = -\(\frac{1}{4}\)

Ответ:
a) -2,02
б) 20
в) -1/4