(84-x)=90

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Solution for (84-x)=90 equation: 



(84-x)=90

We move all terms to the left:

(84-x)-(90)=0

We add all the numbers together, and all the variables

(-1x+84)-90=0

We get rid of parentheses

-1x+84-90=0

We add all the numbers together, and all the variables

-1x-6=0

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

-x=6

x=6/-1

x=-6

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