Question

Помогите!!!!
А и Д
Даю 30 баллов

Answer 1

$1)\left \{ {{2x+13=5y} \atop {3x+4y-15=0}} \right. \\\\\left \{ {{2x-5y=-13}|*3 \atop {3x+4y=15}|*(-2)} \right.\\\\+\left \{ {{6x-15y=-39} \atop {-6x-8y=-30}} \right. \\--------\\-23y=-69\\\\y=3\\\\2x=5y-13=5*3-13=15-13=2\\\\x=1\\\\Otvet:\boxed{(1 \ ; \ 3)}$

$2)\left \{ {{x+5y-2=0} \atop {3y-9=2x}} \right.\\\\\left \{ {{x+5y=2}|*2 \atop {-2x+3y=9}} \right.\\\\+\left \{ {{2x+10y=4} \atop {-2x+3y=9}} \right. \\------\\13y=13\\\\y=1\\\\x=2-5y=2-5*1=2-5=-3\\\\Otvet:\boxed{(-3 \ ; \ 1)}$