Let P be a plane containing the line (x-1)/3=(y+6)/4=(z+5)/2 and parallel to the line (x-3)/4=(y-2)/-3=(z+5)/7. If the point (1,-1, α) lies on the…

Let P be a plane containing the line $\displaystyle \frac{x-1}{3}=\frac{y+6}{4}=\frac{z+5}{2}$ and parallel to the line $\displaystyle \frac{x-3}{4}=\frac{y-2}{-3}=\frac{z+5}{7}$. If the point $\displaystyle (1,-1, \alpha)$ lies on the plane P, then the value of $\displaystyle |5 \alpha|$ is equal to \_\_\_\_.