4x-3y=5 2x-y=2 x=?y=?
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4x-3y=5 2x-y=2 x=?y=?
4x-3y=5 2x-y=2 x=?y=?
4x-3y=5 2x-y=2 x=?y=?
2x-y=2,4x-2y=4——(2),
4x-3y=5——(1)
(1)-(2),-y=1,y=-1.
把y=-1代入(1),4x+3=5,4x=2,x=1/2.
x=1/2,y=-1.
X=0.5 Y= -1
x=0.5 y=-1
4x-3y=5 ①
2x-y=2
4x-2y=4 ②
①-②得
-y=1
y=-1
将y=-1代入①
得4x+3=5
4x=2
x=1/2
答:x=1/2 y=-1
x=1/2 y=-1
《德
变形得:4x-3y=5 4x-2y=4 得Y=-1 X=1/2
小朋友,这是不是幼儿园的奥数题呀?孩子,别学这些了,快出门找小伙伴一起玩吧。这种题交给叔叔们算。
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