12x-45=135-8x

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Solution for 12x-45=135-8x equation: 



12x-45=135-8x

We move all terms to the left:

12x-45-(135-8x)=0

We add all the numbers together, and all the variables

12x-(-8x+135)-45=0

We get rid of parentheses

12x+8x-135-45=0

We add all the numbers together, and all the variables

20x-180=0

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

20x=180

x=180/20

x=9

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