Question 829561
{{{3y-x=2}}}
{{{3y+x=16}}}
Add the two equations together,
{{{3y-x+3y+x=2+16}}}
{{{6y=18}}}
{{{highlight(y=3)}}}
Then use either equation to solve for {{{x}}}.
{{{3(3)+x=16}}}
{{{9+x=16}}}
{{{highlight(x=7)}}}