Question

решить систему {3х+2y= -4
{25x-6y= -22

Answer 1

$+ left { {{3x+2y=-4 |*3} atop {25x-6y=-22}} right.$
$3(3x+2y)+(25x-6y)=3*(-4) - 22$
$34x = -34$
$x = -1$ ⇒ $3*(-1)+2y = 4$ ⇒ $y = -0.5$
$(-1 ; -0.5)$