81=-63-12x

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Solution for 81=-63-12x equation: 



81=-63-12x

We move all terms to the left:

81-(-63-12x)=0

We add all the numbers together, and all the variables

-(-12x-63)+81=0

We get rid of parentheses

12x+63+81=0

We add all the numbers together, and all the variables

12x+144=0

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

12x=-144

x=-144/12

x=-12

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