Question

помогите, пожалуйста
2,3 пожалуйста ​

Answer 1

$\displaystyle\bf\\2)\\\\\left \{ {{2x+3y=-4} \ |\cdot(-1) \atop {2x-5y=12}} \right. \\\\\\+\left \{ {{-2x-3y=4} \atop {2x-5y=12}} \right.\\ ----------\\-8y=16\\\\y=16:(-8)=-2\\\\2x=-3y-4=-3\cdot(-2)-4=6-4=2\\\\x=2:2=1\\\\Otvet: \ (1 \ ; \ -2)\\\\\\3)\\\\\left \{ {{4x-3y=10} \ |\cdot2\atop {3x-2y=7} \ |\cdot(-3)} \right. \\\\\\+\left \{ {{8x-6y=20} \atop {-9x+6y=-21}} \right. \\-----------\\-x=-1\\\\x=1\\\\2y=3x-7=3\cdot 1-7=3-7=-4\\\\y=-4:2=-2\\\\Otvet: \ (1 \ ; \ -2)$