Question

40 БАЛЛОВ ДАЮ ПОМОГИТЕ СРОЧНООО

Answer 1

Відповідь:

$\left \{ {{x=2} \atop {y=7}} \right.$

Пояснення:

$\left \{ {{8x-2y=2} \atop {-4x+4y=20}} \right. \\\left \{ {{4x-y=1} \atop {-x+y=5}} \right. \\\left \{ {{4x-y=1} \atop {y=5+x}} \right. \\\left \{ {{4x-(5+x)=1} \atop {y=5+x}} \right. \\\left \{ {{4x-5-x=1} \atop {y=5+x}} \right. \\\left \{ {{3x=6} \atop {y=5+x}} \right. \\\left \{ {{x=2} \atop {y=5+x}} \right. \\\left \{ {{x=2} \atop {y=7}} \right.$

Answer 2

Ответ:

8х-2у=2

-4х+4у=20

х=20-2

у=18