作业帮x+y=480 (x-x/5)*2/3=y-15怎么解
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/12 02:14:06
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x+y=480 (x-x/5)*2/3=y-15怎么解
x+y=480 (x-x/5)*2/3=y-15怎么解
x+y=480 (x-x/5)*2/3=y-15怎么解
连等的话,那么x+y=y-15,x=-15 带到等式里面就能算出y
我刚回答你的问题的时候，就再想，题目是不是有问题，你再看看原题，根据你给的题方程就是这样列的。但是我后来解了一下，数好象不太整齐，
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
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
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
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
3^x+2x=y,x
（x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
先化简,再求值 [2/3x - 2/x+y（x+y/3x -x-y）]*x/x-y,其中5x+3y=0
先化简,再求值:[3x-2/x+y(x+y/3x-x-y)]/(x-y/x),其中5x+3y=0
若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
2x+3x-5y=