(6x-21)=90

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Solution for (6x-21)=90 equation: 



(6x-21)=90

We move all terms to the left:

(6x-21)-(90)=0

We get rid of parentheses

6x-21-90=0

We add all the numbers together, and all the variables

6x-111=0

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

6x=111

x=111/6

x=18+1/2

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