\[ \frac{8(3x-1)}{40} - \frac{5(2x+6)}{40} = 5 \]
\[ \frac{24x - 8 - (10x + 30)}{40} = 5 \]
\[ \frac{24x - 8 - 10x - 30}{40} = 5 \]
\[ \frac{14x - 38}{40} = 5 \]
\[ 14x - 38 = 5 \times 40 \]
\[ 14x - 38 = 200 \]
\[ 14x = 200 + 38 \]
\[ 14x = 238 \]
\[ x = \frac{238}{14} \]
\[ x = 17 \]
Ответ: 17