4K=80z/100-z

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Solution for 4K=80z/100-z equation: 



4=80K/100-K

We move all terms to the left:

4-(80K/100-K)=0



Domain of the equation: 100-K)!=0

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

-K)!=-100

K!=-100/1

K!=-100

K∈R



We add all the numbers together, and all the variables

-(-1K+80K/100)+4=0

We get rid of parentheses

1K-80K/100+4=0

We multiply all the terms by the denominator


1K*100-80K+4*100=0

We add all the numbers together, and all the variables

-80K+1K*100+400=0

Wy multiply elements

-80K+100K+400=0

We add all the numbers together, and all the variables

20K+400=0

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

20K=-400

K=-400/20

K=-20

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