84=5x+3x+4

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Solution for 84=5x+3x+4 equation: 



84=5x+3x+4

We move all terms to the left:

84-(5x+3x+4)=0

We add all the numbers together, and all the variables

-(8x+4)+84=0

We get rid of parentheses

-8x-4+84=0

We add all the numbers together, and all the variables

-8x+80=0

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

-8x=-80

x=-80/-8

x=+10

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