Question

已知x=y+1分之y-1,用含x的代数式表示y,则y等于多少?

帮个忙。。。求你勒！！！

Answer 1

x=(y-1)/(y+1)
x(y+1)=y-1
xy+x=y-1
xy-y=-x-1
(x-1)y=-(x+1)
y=-(x+1)/(x-1)

Answer 2

y=1-x分之1+x

Answer 3

y=(x+1)/(1-x)

Answer 4

y=[2/(1-x)]-1