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5x-6y=11 / *8
54x + 48y=6
40x-48y=88
+ ----------------
94x=94
x=1
9+8y=1
y= -1
5x-6y=11 /*4
27x+24y=3
20x-24y=44
47x=47 /:47
x=1
-6y=11-5
-6y=6 /:(-6)
y=-1
x=1
y=-1