x+2y=10 3x—2y=6 解得:x=___,y=___ ,
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x+2y=10 3x—2y=6 解得:x=___,y=___ ,
x+2y=10 3x—2y=6 解得:x=___,y=___ ,
x+2y=10 3x—2y=6 解得:x=___,y=___ ,
x+2y=10
3x—2y=6
两式相加
4x=16
x=16/4
x=4
4+2y=10
2y=10-4
2y=6
y=3
x=4
y=3
x+2y=10
3x-2y=6
一式+二式得
4x=16
x=4
带入一式得
y=3
x+2y=10
x=10-2y
代入3x—2y=6
3(10-2y)-2y=6
30-6y-2y=6
30-6=8y
y=24/8
y=3
x=10-2*3
x=4
x+2y+3x-2y=10+6
4x=16
x=4
代入x+2y=10
2y=6
y=3
x+2y=10 (1)
3x-2y=6 (2)
(1)+(2)=(x+2y)+(3x-2y)=4x=16 x=4
将x=4代入(1)
4+2y=10 2y=6 y=3
所以:x=4,y=3
x+2y=10 3x—2y=6 解得:x=___,y=___ ,
x+2y=10 3x+2y=6 解得:x=___,y=___ 要,
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