Question 940474
Multiply the first equation by 2.
{{{-10x+6y=24}}}
Multiply the second equation by 5.
{{{10x+25y=-55}}}
Add the two equations together to eliminate {{{x}}}.
{{{-10x+6y+10x+25y=24-55}}}
{{{31y=-31}}}
{{{y=-1}}}
Then use either equation to solve for {{{x}}}
{{{-5x+3(-1)=12}}}
{{{-5x-3=12}}}
{{{-5x=15}}}
{{{x=-3}}}