Question 344129
Solve the system of equations
1.{{{3x + y =1}}}
2.{{{-x + 2y = 9}}}
Multiply eq. 2 by 3 and add to eq. 1,
{{{3x+y-3x+6y=1+27}}}
{{{7y=28}}}
{{{highlight(y=4)}}}
.
.
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From eq. 2,
{{{-x+8=9}}}
{{{-x=1}}}
{{{highlight(x=-1)}}}