Question

реши систему уравнений 2x+3y=-1 и 3x+5y=-2​

Answer 1

$\displaystyle\bf\\\left \{ {{2x+3y=-1} \ |\cdot 3 \atop {3x+5y=-2} \ |\cdot(-2)} \right. \\\\\\+\left \{ {{6x+9y=-3} \atop {-6x-10y=4}} \right.\\ ----------\\-y=1\\\\y=-1\\\\2x=-3y-1=-3\cdot(-1)-1=3-1=2\\\\x=2:2=1\\\\Otvet: \ \Big(1 \ ; \ -1\Big)$