5/2(X+y)=120010/3(X-y)=1200尽量用初一的方法,我们上了加减法与代入法,老师还说了整体代入法!
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5/2(X+y)=120010/3(X-y)=1200尽量用初一的方法,我们上了加减法与代入法,老师还说了整体代入法!5/2(X+y)=120010/3(X-y)=1200尽量用初一的方法,我们上了加
5/2(X+y)=120010/3(X-y)=1200尽量用初一的方法,我们上了加减法与代入法,老师还说了整体代入法!
5/2(X+y)=1200
10/3(X-y)=1200
尽量用初一的方法,我们上了加减法与代入法,老师还说了整体代入法!
5/2(X+y)=120010/3(X-y)=1200尽量用初一的方法,我们上了加减法与代入法,老师还说了整体代入法!
方程变形
(X+y)=1200*2/5
(X-y)=1200*3/10
两个方程相加
2x=480+360
x=420
代入x+y=480
y=60
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)请帮我一下写两道计算题[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以(4x)
((x+2y)x^2+(x-y)(3x-y)-5y^2)÷2x
化简:5(x-y)+2(x+y)-3(x-y)
2(x-y)²-3(x-y)(-y-x)
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0
-(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-(5x-2y)+2(2x-y)
1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2}
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解
(2x-3y)-(5x-y)
(2X-3y)-(5x-y)
(2x-5y)(3x+y)
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)