\[4x^{2} - 7x = 0\]
\[x(4x - 7) = 0\]
\[x = 0;\ \ \ 4x - 7 = 0\]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 4x = 7\]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = 1,75\]
\[Ответ:x = 0;x = 1,75.\]