Question 382008
1.{{{2x+6y=15}}}
2.{{{4x+6y=15}}}
Multiply eq. 1 by (-2) and add to eq. 2,
{{{-4x-12y+4x+6y=-30+15}}}
{{{-6y=-15}}}
{{{highlight(y=5/2)}}}
Then from eq. 1,
{{{2x+15=15}}}
{{{2x=0}}}
{{{highlight(x=0)}}}