-42=9-12x

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Solution for -42=9-12x equation: 



-42=9-12x

We move all terms to the left:

-42-(9-12x)=0

We add all the numbers together, and all the variables

-(-12x+9)-42=0

We get rid of parentheses

12x-9-42=0

We add all the numbers together, and all the variables

12x-51=0

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

12x=51

x=51/12

x=4+1/4

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