20-n=7(3n+6)

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Solution for 20-n=7(3n+6) equation: 



20-n=7(3n+6)

We move all terms to the left:

20-n-(7(3n+6))=0

We add all the numbers together, and all the variables

-1n-(7(3n+6))+20=0



We calculate terms in parentheses: -(7(3n+6)), so:

7(3n+6)

We multiply parentheses

21n+42

Back to the equation:

-(21n+42)



We get rid of parentheses

-1n-21n-42+20=0

We add all the numbers together, and all the variables

-22n-22=0

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

-22n=22

n=22/-22

n=-1

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