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12/3x=9
We move all terms to the left:
12/3x-(9)=0
Domain of the equation: 3x!=0We multiply all the terms by the denominator
x!=0/3
x!=0
x∈R
-9*3x+12=0
Wy multiply elements
-27x+12=0
We move all terms containing x to the left, all other terms to the right
-27x=-12
x=-12/-27
x=4/9
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