81=7-2(3-5x)

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Solution for 81=7-2(3-5x) equation: 



81=7-2(3-5x)

We move all terms to the left:

81-(7-2(3-5x))=0

We add all the numbers together, and all the variables

-(7-2(-5x+3))+81=0



We calculate terms in parentheses: -(7-2(-5x+3)), so:

7-2(-5x+3)

determiningTheFunctionDomain
-2(-5x+3)+7

We multiply parentheses

10x-6+7

We add all the numbers together, and all the variables

10x+1

Back to the equation:

-(10x+1)



We get rid of parentheses

-10x-1+81=0

We add all the numbers together, and all the variables

-10x+80=0

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

-10x=-80

x=-80/-10

x=+8

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