30+((3x-10)2)=90

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Solution for 30+((3x-10)2)=90 equation: 



30+((3x-10)2)=90

We move all terms to the left:

30+((3x-10)2)-(90)=0

We add all the numbers together, and all the variables

((3x-10)2)-60=0



We calculate terms in parentheses: +((3x-10)2), so:

(3x-10)2

We multiply parentheses

6x-20

Back to the equation:

+(6x-20)



We get rid of parentheses

6x-20-60=0

We add all the numbers together, and all the variables

6x-80=0

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

6x=80

x=80/6

x=13+1/3

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