Two diagonal sides of a parallelogram \(ABCD\) are
\[
x-y+1=0
\]
and
\[
3x-y=9.
\]
If one of its diagonals is
\[
7x-5y+3=0,
\]
then the equation of the other diagonal is
Show Hint
The diagonals of a parallelogram bisect each other. Find the midpoint of the known diagonal first, then determine the equation of the other diagonal passing through the same midpoint.