Question 858696
From eq. 2,
{{{ y = 3x+6}}}
Substitute into eq. 1,
{{{-2x + 4y = 14}}}
{{{-x+2y=7}}}
{{{-x+2(3x+6)=7}}}
{{{-x+6x+12=7}}}
{{{5x=-5}}}
{{{x=-1}}}
Then 
{{{y=3(-1)+6}}}
{{{y=-3+6}}}
{{{y=3}}}