\[\boxed{\text{952.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\textbf{а)}\ \frac{13x - 1}{2} < 4x\]
\[13x - 1 < 8x\]
\[5x < 1\]
\[x < 0,2\]
\[x \in ( - \infty;0,2)\]
\[\textbf{б)}\ \frac{5 - 2a}{4} \geq 2a\]
\[5 - 2a \geq 8a\]
\[- 10a \geq - 5\]
\[a \leq 0,5\]
\[a \in ( - \infty;0,5\rbrack\]
\[\textbf{в)}\frac{x}{4} - \frac{x}{5} \leq 2\]
\[\frac{5x - 4x}{20} \leq 2\]
\[x \leq 40\]
\[x \in ( - \infty;40\rbrack\]
\[\textbf{г)}\frac{2y}{5} - \frac{y}{2} \geq 1\]
\[\frac{4y - 5y}{10} \geq 1\]
\[- y \geq 10\]
\[y \leq - 10\]
\[y \in ( - \infty; - 10\rbrack\]