把4x-3y-9=0,x-2y-1=0.这两个化简
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把4x-3y-9=0,x-2y-1=0.这两个化简
![把4x-3y-9=0,x-2y-1=0.这两个化简](/uploads/image/z/19233244-28-4.jpg?t=%E6%8A%8A4x-3y-9%3D0%2Cx-2y-1%3D0.%E8%BF%99%E4%B8%A4%E4%B8%AA%E5%8C%96%E7%AE%80)
4x-3y-9=0 (1)
x-2y-1=0 (2)
(1)-(2)×4
3y-9+8y+4=0
5y=5
所以
y=1
x=2y+1=3
x-2y-1=0 (2)
(1)-(2)×4
3y-9+8y+4=0
5y=5
所以
y=1
x=2y+1=3
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