3x+9-12x=45

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Solution for 3x+9-12x=45 equation: 



3x+9-12x=45

We move all terms to the left:

3x+9-12x-(45)=0

We add all the numbers together, and all the variables

-9x-36=0

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

-9x=36

x=36/-9

x=-4

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