3x+2y=9 6x-5y=2球解
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3x+2y=9 6x-5y=2球解
3x+2y=9 6x-5y=2球解
3x+2y=9 6x-5y=2球解
3x+2y=9得到6x+4y=18`````````1式
6x-5y=2````````````````````````````2式
1式-2式得到 9y=16 得到y=16/9
带到2式 得到x=49/27
X=17/27,Y=16/9
3x+2y=9
6x-5y=2
6x+4y=18
6x-5y=2
9x=16
x=16/9
16/3+2y=9
2y=11/3
y=11/6
x=16/9
y=11/6
x是49/27 y是16/9
3x+2y=9......①
6x-5y=2.......②
将①式乘以2,得6x+4y=18.....③
再将③-②,可得y=16/9,再代入①得x=49/27
∵6x+4y=18, 6x-5y=2, ∵9y=16, y=16/9. 代人得:3x=9-32/9=49/9 .∴x=49/27.
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