Решите уравнение: (3x+1)/10-(8x-3)/7=-2.

\[\frac{3x + 1}{10} - \frac{8x - 3}{7} = - 2\ \ \ | \cdot 70\]

\[7(3x + 1) - 10(8x - 3) = - 140\]

\[21x + 7 - 80x + 30 = - 140\]

\[- 59x = - 140 - 37\]

\[- 59x = - 177\]

\[x = 3.\]