Question 397609
1.{{{x-2y+10=0}}} 
2.{{{5x+4y+8=0}}}
Multiply eq. 1 by 2 and add to eq. 2,
{{{2x-4y+20+5x+4y+8=0}}}
{{{7x+28=0}}}
{{{7x=-28}}}
{{{x=-4}}}
Then use either equation to solve for {{{y}}}.
{{{-4-2y+10=0}}}
{{{-2y+6=0}}}
{{{-2y=-6}}}
{{{y=3}}}