Question 820300
Parallel Lines have same slope.
m=slope
{{{2x-y=5}}}
{{{-y=5-2x}}}
{{{(-y)*-1=(5-2x)*-1}}}
{{{y=-5+2x}}}
{{{m=2}}}

At point (2,1) m=2
{{{x=2}}}
{{{y=1}}}
{{{y-1=2(x-2)}}}
{{{y-1=2x-4}}}
{{{y-2x=-4+1}}}
{{{y-2x=-3}}} or {{{2x-y=3}}}