3=(9-n)/4

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Solution for 3=(9-n)/4 equation: 



3=(9-n)/4

We move all terms to the left:

3-((9-n)/4)=0

We add all the numbers together, and all the variables

-((-1n+9)/4)+3=0

We multiply all the terms by the denominator


-((-1n+9)+3*4)=0



We calculate terms in parentheses: -((-1n+9)+3*4), so:

(-1n+9)+3*4

We add all the numbers together, and all the variables

(-1n+9)+12

We get rid of parentheses

-1n+9+12

We add all the numbers together, and all the variables

-1n+21

Back to the equation:

-(-1n+21)



We get rid of parentheses

1n-21=0

We add all the numbers together, and all the variables

n-21=0

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

n=21

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