Question 918443

Substitution:
{{{X=2y-3}}}.......eq.1
{{{X=2y+4}}}. .....eq.2
__________________________substitute {{{x}}} from eq.1 into eq.2

{{{2y-3=2y+4}}}. .....eq.2...........solve for {{{y}}}

{{{2y-2y=3+4}}}

{{{0=7}}}....{{{y}}} cancels, so there is no solution, lines are parallel

{{{ graph( 600, 600, -10, 10, -10, 10, x/2+3/2, x/2-2) }}}