Вопрос школьника по предмету Алгебра
Решите методом подстановки систему уравнений
X+4y=-6
{
3x-y=8
Ответ учителя по предмету Алгебра
{x+4y=-6 x=-6-4y
{3x-y=8
3(-6-4y)-y=8
-18-12y-y=8
-13y=26
y=-2
3x-(-2)=8
3x+2=8
3x=6
x=2
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