(80+x)/2=90

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Solution for (80+x)/2=90 equation: 



(80+x)/2=90

We move all terms to the left:

(80+x)/2-(90)=0

We add all the numbers together, and all the variables

(x+80)/2-90=0

We multiply all the terms by the denominator


(x+80)-90*2=0

We add all the numbers together, and all the variables

(x+80)-180=0

We get rid of parentheses

x+80-180=0

We add all the numbers together, and all the variables

x-100=0

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

x=100

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