Question 351828
1.{{{x+y=3}}}
2.{{{3x+2y=9}}}
From eq. 1,
{{{x=3-y}}}
Substitute into eq. 2,
{{{3(3-y)+2y=9}}}
{{{9-3y+2y=9}}}
{{{-y=0}}}
{{{highlight(y=0)}}}
Then from eq. 1,
{{{x+0=3}}}
{{{highlight(x=3)}}}