81=(4x+2)+(8x-5)

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Solution for 81=(4x+2)+(8x-5) equation: 



81=(4x+2)+(8x-5)

We move all terms to the left:

81-((4x+2)+(8x-5))=0



We calculate terms in parentheses: -((4x+2)+(8x-5)), so:

(4x+2)+(8x-5)

We get rid of parentheses

4x+8x+2-5

We add all the numbers together, and all the variables

12x-3

Back to the equation:

-(12x-3)



We get rid of parentheses

-12x+3+81=0

We add all the numbers together, and all the variables

-12x+84=0

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

-12x=-84

x=-84/-12

x=+7

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