Question 1019995
{{{12(x/4+y/3)=12(-3/4)}}}
{{{3x+4y=-9}}}


The system is  {{{system(2x-y=5,3x+4y=-9)}}}.


Multiply members of the first equation by 4.
{{{system(8x-4y=20,3x+4y=-9)}}}


Add corresponding members.
{{{11x+0=11}}}


{{{11x=11}}}

{{{highlight(x=1)}}}
Continue to find y.