The equations are
[tex]\begin{gathered} Y=5x-4 \\ Y=-4+5x \end{gathered}[/tex]Solve the equations for varaible x.
[tex]\begin{gathered} 5x-4=-4+5x \\ -4=-4 \end{gathered}[/tex]Since each side of the equation is equal to each other. So lines overlap each other and there are infinitely many solution for the equations.