Question 571902
{{{3x-9y=45}}}...........(1)
{{{3(x-3y)=45}}}
{{{3(x-3y)/3=45/3}}}
{{{cross(3)(x-3y)/cross(3)=cross(45)/cross(3)}}}
{{{x-3y=15}}}



{{{-4x+12y=20}}}...........(2)
{{{-4(x-3y)=20}}} 
{{{-4(x-3y)/4=20/4}}}
{{{cross(-4)(x-3y)/cross(-4)=cross(20)/cross(-4)}}}
{{{x-3y=-5}}}

Pair of equations is inconsistent