номер 76 гдз 8 класс алгебра Муравин Муравина

1)\begin{equation}\frac{11x-19}{2x-3}+\frac{19x-26}{2x-3} \end{equation} \begin{equation}\frac{11x-19+19x-26}{2x-3}=\frac{30x-45}{2x-3}= \end{equation} \begin{equation}=\frac{15\left ( 2x-3 \right )}{2x-3}=15 \end{equation} 2) \begin{equation}\frac{13-7x}{20x-30}-\frac{17x-23}{20x-30} \end{equation} \begin{equation}\frac{13-7x-17x+23}{20x-30}=\frac{36-24x}{20x-30}= \end{equation} \begin{equation}=\frac{12\left ( 3-2x \right )}{10\left ( 2x-3 \right )}=-\frac{6}{5} \end{equation}