\[ \frac{5(5x-1)}{15} - \frac{3(6x-1)}{15} = -2 \]
\[ \frac{25x - 5 - (18x - 3)}{15} = -2 \]
\[ \frac{25x - 5 - 18x + 3}{15} = -2 \]
\[ \frac{7x - 2}{15} = -2 \]
\[ 7x - 2 = -2 \times 15 \]
\[ 7x - 2 = -30 \]
\[ 7x = -30 + 2 \]
\[ 7x = -28 \]
\[ x = \frac{-28}{7} \]
\[ x = -4 \]
Ответ: -4