Tentukan cara eliminasi x dan y dari..

1. x = 105 , dan y = 98
2. x = 3, dan y = -3

2x + y = 112
x + y = 7
_____________-
x = 105

2x + y = 112 (x1)
x + y = 7 (x2)
_________________
2x + y = 112
2x + 2y = 14
_________________-
-y = 98
y = – 98

2x – 3y = 15 (x3)
3x + y = 6. (x2)
_________________
6x – 9y = 45
6x + 2y = 12
_________________ –
-11y = 33
y = -3
x = 3

6x – y = 2 (x2)
3x – 2y = -5 (x1)
__________________
12x – 2y = 4
3x – 2y = -5
__________________+
15x= -1
x= -1/5
y= 1,75