解方程组2(x-y)/3-(x+y)/4=-1 ,6(x+y)-4(2x-y)=16 怎么求啊,
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解方程组2(x-y)/3-(x+y)/4=-1,6(x+y)-4(2x-y)=16怎么求啊,解方程组2(x-y)/3-(x+y)/4=-1,6(x+y)-4(2x-y)=16怎么求啊,解方程组2(x-
解方程组2(x-y)/3-(x+y)/4=-1 ,6(x+y)-4(2x-y)=16 怎么求啊,
解方程组2(x-y)/3-(x+y)/4=-1 ,6(x+y)-4(2x-y)=16 怎么求啊,
解方程组2(x-y)/3-(x+y)/4=-1 ,6(x+y)-4(2x-y)=16 怎么求啊,
由(1)得
8(x-y)-3(x+y)=-12
5x-11y=-12 (3)
由(2)得
-2x+10y=16
-x+5y=8 (4)
(3)+(4)×5
14y=28
∴y=2
把y=2代入(4)得
-x+10=8
∴x=2
∴x=2
y=2
2(x-y) (x+y) 8(x-y)-3(x-y)
--------- - -------- =-1 可以解成这样 ----------------------- = -1然后得到5x-11y=-12
3 4 12
6(x+y)-4(2x-y)=16解成-2x+10y=16
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解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
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3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
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