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12/3XX=40
We move all terms to the left:
12/3XX-(40)=0
Domain of the equation: 3XX!=0We multiply all the terms by the denominator
X!=0/1
X!=0
X∈R
-40*3XX+12=0
Wy multiply elements
-120X+12=0
We move all terms containing X to the left, all other terms to the right
-120X=-12
X=-12/-120
X=1/10
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