{3x+2y=12{4x+3y=17
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{3x+2y=12{4x+3y=17{3x+2y=12{4x+3y=17{3x+2y=12{4x+3y=171式x3-2式x29x+6y-8x-6y=36-34x=23x2+2y=122y=6y=3在
{3x+2y=12{4x+3y=17
{3x+2y=12{4x+3y=17
{3x+2y=12{4x+3y=17
1式x3-2式x2
9x+6y-8x-6y=36-34
x=2
3x2+2y=12
2y=6
y=3
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