方程组 4x+3y=8 3x+4y=6
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方程组 4x+3y=8 3x+4y=6
方程组 4x+3y=8 3x+4y=6
方程组 4x+3y=8 3x+4y=6
4x+3y=8
3x+4y=6
(4x+3y=8)x3=12x+9y=24
(3x+4y=6)x4=12x+16y=24
(12x+9y)-(12x+16y)=24-24
解得-7y=0
∴y=0
∴x=2
12x+9y=24
12x+16y=24
相减 7y=0 y=0
x=2
好好学习,很简单的
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