Question 834938
{{{2(x-y)=4}}}
1.{{{x-y=2}}}
2.{{{3x+y=10}}}
Add eqs. 1 and 2,
{{{x-y+3x+y=2+10}}}
{{{4x=12}}}
{{{x=3}}}
Then use either equation to solve for {{{y}}},
{{{x-y=2}}}
{{{3-y=2}}}
{{{y=1}}}