4x+8y=5(x+y)
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4x+8y=5(x+y)
2x^2y×(-8y^2)+4x^2y×5y^2
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
(x+y)^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 ..
5X+8Y=56 4Y=X 求X.Y各多少
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2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
计算:(1)8x^2y^2*(-3x/4y^5) (2)(x+y)^2/xy-y^2*(y-x)^2/xy+y^2
化简(4x-2y)-[5x-(8y-2x-x-y)]+x
化简(4x-2y)-﹛5x-[8y-2x-(x+y)]-x﹜
(1)x(x+10)-2(3x-2) 分解因式y(2y+1)-y(y-1)+1 2x(2x-y)+y(y-2x) 2y(y-2)-y(y-4)-1 x(x+8)-8(x+2) (a+2)(a-2)-5 (x-3)(a-2)-5 (x+3)(x+4)+4分之1
方程组:x(y+1)+2(y+1)=y(y-1)x-5(y-1) x(4+y)-y(8-x)=-20x(y+1)+2(y+1)=y(y-1)x-5(y-1) x(4+y)-y(8-x)=-20(这是一个方程组.)
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