Question 317533
1.{{{x -2y = -1}}}
2.{{{-x + 5y = 4}}}
Add the equations,
{{{x-2y-x+5y=-1+4}}}
{{{3y=3}}}
{{{highlight(y=1)}}}
Then use either equation,
{{{-x+5=4}}}
{{{-x=-1}}}
{{{highlight(x=1)}}}