解3xy+y =2x-1
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 21:41:08
解3xy+y =2x-1
y=(2x-1)/(3x+1)
x=(y+1)/(2-3y)
y=(2x-1)/(3x+1)
你要求啥?
你是不是打错了?
x-y/x+y=-1/2,x*x-xy-2y*y/x*x-3xy+2y*y的解是多少?同上,请将过程写出,
1-2/x+y=xy,4y+6x=xy.求xy的解?
若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思,是3x-2xy-3y/x-2xy-y
( )-(x^2+3xy)=-xy-1/3y^2
(x+2y-3xy)-(-2x-y+xy),其中x+y=1/2,xy=-1/2
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知3/(x-y)=1/xy 求(-x-2xy+y)/ (2x+3xy-2y)
已知1/x-1/y=2,求3x+7xy-3y/2x-3xy-2y答案是1/x-1/y=2(y-x)/xy=2 得:x-y=-2xy(3x+7xy-3y)/(2x-3xy-2y)=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy)=xy/(-7xy)=-1/7 谁能帮我解释一下=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy) 是怎
求方程组的解,方程组xy/(2x+y)-xy/(2x-y)=3,xy/(2x-y)+xy/(2x+y)=4
若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)=
若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
x-y=1,xy=2.求:(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
.已知:x-y=1,xy=-2.求:(-2xy+2 x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
(-2xy+2x+5y)-(3xy+2y-2x)-(x+4y+xy)其中x-y=4xy=-1
4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6
(x+2y-3xy+2x+y-xy)-(-2-y+xy),其中x+y=2分之1,xy=-2分之1
已知x y=1,xy=-3,求2xy-4x 4(y-2(xy-x))
解方程组 xy=1 x-y=3/2