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4/x-3=18
We move all terms to the left:
4/x-3-(18)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
4/x-21=0
We multiply all the terms by the denominator
-21*x+4=0
We add all the numbers together, and all the variables
-21x+4=0
We move all terms containing x to the left, all other terms to the right
-21x=-4
x=-4/-21
x=4/21
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