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3x+2y=13
x-3y=9
-------------
3x+2y=13
3x-9y=27
------------ (-)
11y=-14
y=-14/11
y=-1 3/11
x-3y=9
x-3(-14/11)=9
x+42/11=9
x=9-42/11
x=99/11-42/11
x=57/11
x=5 2/11
HP={5 2/11, -1 3/11}
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