3x+2y=12.4 2x+3y=12.6 x=[ ] y=[ ]
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3x+2y=12.42x+3y=12.6x=[]y=[]3x+2y=12.42x+3y=12.6x=[]y=[]3x+2y=12.42x+3y=12.6x=[]y=[]将第一个方程两边同时乘以2,得6
3x+2y=12.4 2x+3y=12.6 x=[ ] y=[ ]
3x+2y=12.4 2x+3y=12.6 x=[ ] y=[ ]
3x+2y=12.4 2x+3y=12.6 x=[ ] y=[ ]
将第一个方程两边同时乘以2,得6x+4y=24.8
将第二个方程两边同时乘以3,得6x+9y=37.8
然后两式相减,得5y=13,所以y=2.6
再代入3x+2y=12.4 ,得x=2.4
所以x=2.4,y=2.6
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