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54/7=28/(x+18)
We move all terms to the left:
54/7-(28/(x+18))=0
Domain of the equation: (x+18))!=0We calculate fractions
x∈R
()/7x+54x/7x=0
We multiply all the terms by the denominator
54x+()=0
We add all the numbers together, and all the variables
54x=0
x=0/54
x=0
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