## Elementary Linear Algebra 7th Edition

$x=2$ $y=-1$ (2, -1)
$2x -y = 5$ $5x -y = 11$ Subtract the first equation from the second one. $5x-y-(2x-y)=11-5$ $5x-2x-y+y=6$ $3x=6$ $x=2$ Substitute x in the first equation to get y $2*2 -y=5$ $-y=5-4$ $y=-1$