System:
2x - y = -13
y = x + 9
The solution is:
(x, y) = (-4, 5)
System:
x + y = 7
x - y = -1
The solution is:
(x, y) = (3, 4)
System:
y = 3x - 7
y = 2x - 5
The solution is:
(x, y) = (2, -1)
System:
3x + 2y = 10
6x - y = 10
The solution is:
(x, y) = (2, 2)
System:
4x - 3y = 5
3x + 2y = -9
The solution is:
(x, y) = (-1, -3)
