-81=(-15)+x

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Solution for -81=(-15)+x equation: 



-81=(-15)+x

We move all terms to the left:

-81-((-15)+x)=0



We calculate terms in parentheses: -((-15)+x), so:

(-15)+x

determiningTheFunctionDomain
x+(-15)

We add all the numbers together, and all the variables

x-15

Back to the equation:

-(x-15)



We get rid of parentheses

-x+15-81=0

We add all the numbers together, and all the variables

-1x-66=0

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

-x=66

x=66/-1

x=-66

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