8x=84+x

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Solution for 8x=84+x equation: 



8x=84+x

We move all terms to the left:

8x-(84+x)=0

We add all the numbers together, and all the variables

8x-(x+84)=0

We get rid of parentheses

8x-x-84=0

We add all the numbers together, and all the variables

7x-84=0

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

7x=84

x=84/7

x=12

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