x+84=3x+-84

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Solution for x+84=3x+-84 equation: 



x+84=3x+-84

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

x-3x+84+84=0

We add all the numbers together, and all the variables

-2x+168=0

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

-2x=-168

x=-168/-2

x=+84

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