(6x-18)+3x=90

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Solution for (6x-18)+3x=90 equation: 



(6x-18)+3x=90

We move all terms to the left:

(6x-18)+3x-(90)=0

We add all the numbers together, and all the variables

3x+(6x-18)-90=0

We get rid of parentheses

3x+6x-18-90=0

We add all the numbers together, and all the variables

9x-108=0

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

9x=108

x=108/9

x=12

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