Question 159177
{{{-x+3y=11}}}   equation 1
{{{4x-y=-11}}}   equation 2
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Solve equation 1 for x:
{{{-x+3y=11}}}
{{{3y=x+11}}}
{{{3y-11=x}}}
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Substitute the above into equation 2 and solve for y:
{{{4x-y=-11}}}
{{{4(3y-11)-y=-11}}}
{{{12y-44-y=-11}}}
{{{11y=33}}}
{{{y=3}}}
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Finally, substitute the above back into equation 1 and solve for x:
{{{-x+3y=11}}} 
{{{-x+3(3)=11}}} 
{{{-x+9=11}}} 
{{{9=x+11}}} 
{{{-2=x}}} 
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Solution: x = -2 and y = 3