4/5n-4=21

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Solution for 4/5n-4=21 equation: 



4/5n-4=21

We move all terms to the left:

4/5n-4-(21)=0



Domain of the equation: 5n!=0

n!=0/5

n!=0

n∈R



We add all the numbers together, and all the variables

4/5n-25=0

We multiply all the terms by the denominator


-25*5n+4=0

Wy multiply elements

-125n+4=0

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

-125n=-4

n=-4/-125

n=4/125

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