(3x-39)=90

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Solution for (3x-39)=90 equation: 



(3x-39)=90

We move all terms to the left:

(3x-39)-(90)=0

We get rid of parentheses

3x-39-90=0

We add all the numbers together, and all the variables

3x-129=0

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

3x=129

x=129/3

x=43

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