(2x-81=-7x)

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Solution for (2x-81=-7x) equation: 



(2x-81=-7x)

We move all terms to the left:

(2x-81-(-7x))=0



We calculate terms in parentheses: +(2x-81-(-7x)), so:

2x-81-(-7x)

determiningTheFunctionDomain
2x-(-7x)-81

We get rid of parentheses

2x+7x-81

We add all the numbers together, and all the variables

9x-81

Back to the equation:

+(9x-81)



We get rid of parentheses

9x-81=0

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

9x=81

x=81/9

x=9

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