Question

Find the point of intersection of the lines 3=6x-y and 3x-2y=24 ?

Answer 1

$\left \{ {{3=6x-y\ \ |*(-2)} \atop {3x-2y=24}} \right. \\\\ \left \{ {{-6=-12x+2y} \atop {24=3x-2y}} \right. \\+----\\add\ both\ equations\\\\ 18=-9x\ \ \ | divide\ by\ -9\\\\ x=-2\\\ y=6x-3=6*(-2)-3=-12-3=-15\\\\ Point\ of\ intersection:\ (-2,-15)$