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6x+12=6(9)
We move all terms to the left:
6x+12-(6(9))=0
determiningTheFunctionDomain 6x+12-69=0
We add all the numbers together, and all the variables
6x-57=0
We move all terms containing x to the left, all other terms to the right
6x=57
x=57/6
x=9+1/2
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