Question 839676
12x-8y=-110
30x-17y=-245
Multiply the top equation by -5 
Multiply the bottom equation by 2
{{{-60x +40y=-550}}}
{{{60x -34y = -490}}}
add the two equations
{{{ 6y = 60}}}
{{{ y = 10}}}
substitute 10 for y in 12x-8y=-110
{{{12x-8(10)=-110}}}
{{{12x-80=-110}}}
add 80 to each side
{{{12x=-30}}}
divide each side by 12
{{{x=-30/12}}}
{{{x=-5/2}}}