(z+1)/(z-1)=21

Solution for (z+1)/(z-1)=21 equation:

(z+1)/(z-1)=21

We move all terms to the left:

(z+1)/(z-1)-(21)=0


Domain of the equation: (z-1)!=0

We move all terms containing z to the left, all other terms to the right

z!=1

z∈R


We multiply all the terms by the denominator


(z+1)-21*(z-1)=0

We multiply parentheses

(z+1)-21z+21=0

We get rid of parentheses

z-21z+1+21=0

We add all the numbers together, and all the variables

-20z+22=0

We move all terms containing z to the left, all other terms to the right

-20z=-22

z=-22/-20

z=1+1/10