求采纳
7x+2y=39x-2y=-19x=2分之y-54x+3y=653x+5y=53x-4y=232x-3y=56x+5y=
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相关问题
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3X+2Y=54,2X+3Y=56.X=?Y=?
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求解(1){2x-y=9 3x+y=7 (2){4x-3y=5.6 5x+3y=7.4 (3){2x+3y+19=0 x
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(3x+4y=2,2x-y=5)(y=1-x,x-2y=4)(y=三分之二 x,3x=2y+1)(5x-2y-4=0,x
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计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
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{3x+4y=39-2y 5x+3y=2x+30
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4分之x-3y+3分之y+5=2x-7 10(x-y)-4(1-x)=3y
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(1)﹛2x-y=5 (2) 4x-y=1 (3)5x+y=2 7x-3y=20 y=2x+3 x-3y=4 (4)3x
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y=5:3 x:2=7:3 2x-y-2=34 2x+3y+z=38 3x+4y+2z=56 4x+5y+z=66
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-(5x+y)-7(x-y) -2分之1(x+y)+4分之1(x+2y) 4x-2(x-2) -2x-(3x-1) x-
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2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X