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255/x=12
We move all terms to the left:
255/x-(12)=0
Domain of the equation: x!=0We multiply all the terms by the denominator
x∈R
-12*x+255=0
We add all the numbers together, and all the variables
-12x+255=0
We move all terms containing x to the left, all other terms to the right
-12x=-255
x=-255/-12
x=21+1/4
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