B)
7x – 2y = 15,
2x + y = 9;
4x + 2y = 18;
11x = 33,
x = 3
y = 3
г)
x + 3y = 2,
2x + 3y = 7
x = 5
y = -1
B)
7x – 2y = 15,
2x + y = 9;
7x – 2y = 15,
4x + 2y = 18;
11x = 33,
2x + y = 9;
x = 3
y = 3
г)
x + 3y = 2,
2x + 3y = 7
x + 3y = 2,
x = 5
y = -1
x = 5