\[\boxed{\mathbf{853\ (853).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\frac{x}{y} = 4;\ \ \ \ \frac{y}{x} = \frac{1}{4}\]
\[1)\ \frac{x + y}{x} = \frac{x}{x} + \frac{y}{x} = \ 1 + \frac{1}{4} = 1\frac{1}{4};\]
\[2)\ \frac{3x + 4y}{x} = \frac{3x}{x} + \frac{4y}{x} =\]
\[= 3 + 4 \cdot \frac{1}{4} = 3 + 1 = 4\]