Question 319276
1.{{{x+y=3}}}
2.{{{x-y=4}}}
Add the equations together to eliminate y,
{{{x+y+x-y=3+4}}}
{{{2x=7}}}
{{{highlight(x=7/2)}}}
Then use either equation to solve for y,
{{{7/2+y=3}}}
{{{y=6/2-7/2}}}
{{{highlight(y=-1/2)}}}