84+x=4x

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Solution for 84+x=4x equation: 



84+x=4x

We move all terms to the left:

84+x-(4x)=0

We add all the numbers together, and all the variables

-3x+84=0

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

-3x=-84

x=-84/-3

x=+28

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