a.33x+11y=62 b.11x+33y=26 nilai dari x+y adalah dengan caranya

33x+11y=62 |x1| 33x+11y=62
11x+33y=26 |x3| 33x+99y=78
_______________________-
-88y=-16
y = -16/-188
y = 16/88
y = 2/11

11x+33y = 26
11x+33(2/11) = 26
11x+66 = 26
11x = 26-66
11x = -40
x = -40/11

x+y = -40/11 + 2/11 = -38/11 = -3 5/11