3. Решите уравнения: a) x + 3,12 = - 5,43; б) 1$$\frac{3}{14}$$-y=2$$\frac{7}{10}$$

a) x + 3.12 = -5.43 x = -5.43 - 3.12 x = **-8.55** б) 1$$\frac{3}{14}$$ - y = 2$$\frac{7}{10}$$ $$\frac{17}{14}$$ - y = $$\frac{27}{10}$$ y = $$\frac{17}{14}$$ - $$\frac{27}{10}$$ y = $$\frac{85}{70}$$ - $$\frac{189}{70}$$ y = -$$\frac{104}{70}$$ y = -$$\frac{52}{35}$$ y = -1$$\frac{17}{35}$$