\[\frac{x + 4}{x - 6} = \frac{9}{2}\]
\[2(x + 4) = 9(x - 6)\]
\[2x + 8 = 9x - 54\]
\[9x - 2x = 8 + 54\]
\[7x = 62\]
\[x = \frac{62}{7}\]
Ответ: \[x = \frac{62}{7}\]
\[\frac{x + 5}{3} = \frac{-x + 2}{5}\]
\[5(x + 5) = 3(-x + 2)\]
\[5x + 25 = -3x + 6\]
\[5x + 3x = 6 - 25\]
\[8x = -19\]
\[x = -\frac{19}{8}\]
Ответ: \[x = -\frac{19}{8}\]
\[\frac{7}{5 - x} = \frac{8}{2 + x}\]
\[7(2 + x) = 8(5 - x)\]
\[14 + 7x = 40 - 8x\]
\[7x + 8x = 40 - 14\]
\[15x = 26\]
\[x = \frac{26}{15}\]
Ответ: \[x = \frac{26}{15}\]
\[(-5y - 1.5)(0.3y + 6.3) = 0\]
\[-5y - 1.5 = 0 \quad \text{или} \quad 0.3y + 6.3 = 0\]
\[-5y = 1.5\]
\[y = \frac{1.5}{-5}\]
\[y = -0.3\]
\[0.3y = -6.3\]
\[y = \frac{-6.3}{0.3}\]
\[y = -21\]
Ответ: \[y = -0.3, \quad y = -21\]
\[(15x - 1)(6x + 1.2) = 0\]
\[15x - 1 = 0 \quad \text{или} \quad 6x + 1.2 = 0\]
\[15x = 1\]
\[x = \frac{1}{15}\]
\[6x = -1.2\]
\[x = \frac{-1.2}{6}\]
\[x = -0.2 = -\frac{1}{5}\]
Ответ: \[x = \frac{1}{15}, \quad x = -\frac{1}{5}\]