Question

помогите!срочно!нужен полный ответ!​

Answer 1

Выразим Х из первого уравнения и подставим его во второе.

$\left \{ {{x-2y=-3} \atop {3x+2y=7}} \right. \\\\\\\left \{ {{x=2y-3} \atop {3x+2y=7}} \right. \\\\\\\left \{ {{x=2y-3} \atop {3(2y-3)+2y=7}} \right. \\\\\\\left \{ {{x=2y-3} \atop {6y-9+2y=7}} \right.\\\\\\\left \{ {{x=2y-3} \atop {8y=7+9}} \right.\\\\\\\left \{ {{x=2y-3} \atop {8y=16}} \right.\\\\\\\left \{ {{x=2y-3} \atop {y=2}} \right.\\\\\\\left \{ {{x=2*2-3} \atop {y=2}} \right. \\\\\\\left \{ {{x=1} \atop {y=2}} \right.$