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x - 3y = -36 | . 2 |
_________________
2x + y = -16
2x - 6y = -72
___________ -
7y = 56
y = 56/7
y = 8
Gunakan salah satu persamaan :
x - 3y = -36
x - 24 = -36
x = -36 + 24
x = -12
Himpunan penyelesaian = {-12, 8}
2.) 2x - 3y = -3
4x + 3y = 6
_____________ +
6x = 3
x = 3/6
x = 1/2
Gunakan salah satu persamaan :
2x - 3y = -3
2(1/2) - 3y = -3
1 - 3y = -3
-3y = -3 - 1
-3y = -4
y = 4/3
Himpunan penyelesaian = {1/2, 4/3}
Note : Tanda titik ( . ) artinya kali