85=x+4

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Solution for 85=x+4 equation: 



85=x+4

We move all terms to the left:

85-(x+4)=0

We get rid of parentheses

-x-4+85=0

We add all the numbers together, and all the variables

-1x+81=0

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

-x=-81

x=-81/-1

x=+81

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