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kuas = Rp 5.500,-
2x+3y=101500 |x1| 2x+3y=101500
x+2y =53500 |x2| 2x+4y=107000
----------------------(-)
-y = -5500
y=5500
x+2(5500)=53500
x+11000=53500
x=53500-11000
x=42500