Question

ПОМОГИТЕ!!! Я не могу это решить​

Answer 1

Ответ:

a) 3+2x+5x=10

x=1

y=3+2*1

y=5

б) 3(2+y)-2y=9

y=3

x=2+3

x=5

в) 2(1-y/2)-3y=-6

y=2

x=1-2/2

x=0

Объяснение:

Answer 2

$1)\left \{ {{y=3+2x} \atop {y+5x=10}} \right.\\\\\left \{ {{y=3+2x} \atop {3+2x+5x=10}} \right.\\\\\left \{ {{y=3+2x} \atop {7x=7}} \right.\\\\\left \{ {{x=1} \atop {y=3+2*1}} \right.\\\\\left \{ {{x=1} \atop {y=5}} \right. \\\\Otvet:\boxed{(1;5)}\\\\\\2)\left \{ {{x=2+y} \atop {3x-2y=9}} \right.\\\\\left \{ {{x=2+y} \atop {3*(2+y)-2y=9}} \right.\\\\\left \{ {{x=2+y} \atop {6+3y-2y=9}} \right.\\\\\left \{ {{x=2+y} \atop {y=3}} \right.$

$\left \{ {{x=2+3} \atop {y=3}} \right.\\\\\left \{ {{x=5} \atop {y=3}} \right.\\\\Otvet:\boxed{(5;3)}\\\\\\3)\left \{ {{2x-3y=-6} \atop {3x+1,5y=3}} \right.\\\\\left \{ {{x-1,5y=-3} \atop {3x+1,5y=3}} \right. \\\\\left \{ {{1,5y=x+3} \atop {3x+x+3=3}} \right.\\\\\left \{ {{1,5y=x+3} \atop {4x=0}} \right.\\\\\left \{ {{x=0} \atop {1,5y=3}} \right.\\\\\left \{ {{x=0} \atop {y=2}} \right.\\\\Otvet:\boxed{(0;2)}$