Question 853973
1.{{{x + 3y = 7 }}}
2.{{{3x - 6y = 1}}} 
Multiply eq. 1 by 2 and add to eq. 2,
{{{2x+6y+3x-6y=14+1}}}
{{{5x=15}}}
{{{x=3}}}
Then use either equation to solve for {{{y}}}.
{{{3+3y=7}}}
{{{3y=4}}}
{{{y=4/3}}}