9x=42+12x

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Solution for 9x=42+12x equation: 



9x=42+12x

We move all terms to the left:

9x-(42+12x)=0

We add all the numbers together, and all the variables

9x-(12x+42)=0

We get rid of parentheses

9x-12x-42=0

We add all the numbers together, and all the variables

-3x-42=0

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

-3x=42

x=42/-3

x=-14

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