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(18+x)/x=4/7
We move all terms to the left:
(18+x)/x-(4/7)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
(x+18)/x-(+4/7)=0
We get rid of parentheses
(x+18)/x-4/7=0
We calculate fractions
(7x+126)/7x+(-4x)/7x=0
We multiply all the terms by the denominator
(7x+126)+(-4x)=0
We get rid of parentheses
7x-4x+126=0
We add all the numbers together, and all the variables
3x+126=0
We move all terms containing x to the left, all other terms to the right
3x=-126
x=-126/3
x=-42
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