Question 125071
1.{{{2x-y=4}}}
2.{{{2x-y=6}}}
Let's make these two equations into slope-intercept form, y=mx+b.
1.{{{2x-y=4}}}
{{{2x-4=y}}}
{{{y=2x-4}}}
Slope = 2 
Y-intercept = -4
{{{ graph( 300, 300, -10, 10, -10, 10, 2x-4) }}}
2.{{{2x-y=6}}}
{{{2x-6=y}}}
{{{y=2x-6}}}
Slope = 2 
Y-intercept = -6
{{{ graph( 300, 300, -10, 10, -10, 10, 2x-4,2x-6) }}}
The lines are parallel. 
There is no solution.