(390+x)/6=80

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Solution for (390+x)/6=80 equation: 



(390+x)/6=80

We move all terms to the left:

(390+x)/6-(80)=0

We add all the numbers together, and all the variables

(x+390)/6-80=0

We multiply all the terms by the denominator


(x+390)-80*6=0

We add all the numbers together, and all the variables

(x+390)-480=0

We get rid of parentheses

x+390-480=0

We add all the numbers together, and all the variables

x-90=0

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

x=90

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