Question

решить методом гауса.

Answer 1

$D= left[begin{array}{ccc}2&2\-1&-3end{array}right] = 2*(-3)-2*(-1)=-4$

$D_1= left[begin{array}{ccc}-4&2\-5&-3end{array}right] = -4*(-3)-2*(-5)=22$
$x = frac{D_1}{D} = frac{22}{-4}=-5,5$

$D_2=left[begin{array}{ccc}2&-4\-1&-5end{array}right] = 2*(-5)-(-4)*(-1)=-14$
$y = frac{D_2}{D} = frac{-14}{-4}=3,5$