Question

алгебра 7 класс 13.3 помогите срочно

Answer 1

1) y = 9 + x
7(9 + x) - x = -3
63 + 7x - x = -3
6x = -66
x = -11 
y = 9 - 11 = -2
2) x = -10 - y
-50 - 5y + y= 6
-56 - 4y = 0
-4y = 56
y = -14   x = -10 + 14 = 4