Question 124242
1.{{{x=3y+11}}}
2.{{{2x+5y=0}}}
Substitute the value for x in equation 1 into equation 2 and solve for y.
Then go back and solve for x. 
2.{{{2x+5y=0}}}
{{{2(3y+11)+5y=0}}}
{{{6y+22+5y=0}}}
{{{11y+22=0}}}
{{{11y=-22}}}
{{{y=-22/11}}}
{{{highlight(y=-2)}}}
Then from 1,
1.{{{x=3y+11}}}
{{{x=3(-2)+11}}}
{{{x=-6+11}}}
{{{highlight(x=5)}}}