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|1 -1| |y| = (0)
|3 1| (det) (mencari nilai x)
|0 -1|
|1 1| (det)
|1 -1|
= 3/2
|1 3| (det) (mencari nilai y)
|1 0|
|1 1| (det)
|1 -1|
= 3/2
Jadi x = 3/2 dan y = 3/2
Semoga membantu.