40=12-n

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Solution for 40=12-n equation: 



40=12-n

We move all terms to the left:

40-(12-n)=0

We add all the numbers together, and all the variables

-(-1n+12)+40=0

We get rid of parentheses

1n-12+40=0

We add all the numbers together, and all the variables

n+28=0

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

n=-28

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