2|x|-3|y|=5,3|x|+2|y|=142|x|-3|y|=53|x|+2|y|=14求X,Y 要过程||是绝对值 看清楚
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2|x|-3|y|=5,3|x|+2|y|=142|x|-3|y|=53|x|+2|y|=14求X,Y要过程||是绝对值看清楚2|x|-3|y|=5,3|x|+2|y|=142|x|-3|y|=53|
2|x|-3|y|=5,3|x|+2|y|=142|x|-3|y|=53|x|+2|y|=14求X,Y 要过程||是绝对值 看清楚
2|x|-3|y|=5,3|x|+2|y|=14
2|x|-3|y|=5
3|x|+2|y|=14
求X,Y 要过程||是绝对值 看清楚
2|x|-3|y|=5,3|x|+2|y|=142|x|-3|y|=53|x|+2|y|=14求X,Y 要过程||是绝对值 看清楚
2|x|-3|y|=5 (1)
3|x|+2|y|=14 (2)
(1)式×2＋（2）式×3 ,得：
13|x|=52
x=4或-4
将结果带入（1）式,得：
2×4－3|y|=5
y=1或－1
所以有4组解
x=4,y=1
x=4,y=-1
x=-4,y=1
x=-4,y=-1
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
化简:5(x-y)+2(x+y)-3(x-y)
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
(2x-3y)-(5x-y)
(2X-3y)-(5x-y)
(2x-5y)(3x+y)
(x+y)(2x-3y)=?
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y)