Question bd29f4be

$\frac{7}{8}y-\frac{5}{8}x=\frac{4}{7}-\frac{7}{8}y$

$\frac{5}{4}x+\frac{7}{4}=py+\frac{15}{4}$

In the given system of equations, $p$ is a constant. If the system has no solution, what is the value of $p$?