9(4-n)=12-n

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Solution for 9(4-n)=12-n equation: 



9(4-n)=12-n

We move all terms to the left:

9(4-n)-(12-n)=0

We add all the numbers together, and all the variables

9(-1n+4)-(-1n+12)=0

We multiply parentheses

-9n-(-1n+12)+36=0

We get rid of parentheses

-9n+1n-12+36=0

We add all the numbers together, and all the variables

-8n+24=0

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

-8n=-24

n=-24/-8

n=+3

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