把4x-3y-9=0,x-2y-1=0.这两个化简
人气：417 ℃ 时间：2020-04-23 22:01:51
解答
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
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