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(x-3)/x=4/7
We move all terms to the left:
(x-3)/x-(4/7)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
(x-3)/x-(+4/7)=0
We get rid of parentheses
(x-3)/x-4/7=0
We calculate fractions
(7x-21)/7x+(-4x)/7x=0
We multiply all the terms by the denominator
(7x-21)+(-4x)=0
We get rid of parentheses
7x-4x-21=0
We add all the numbers together, and all the variables
3x-21=0
We move all terms containing x to the left, all other terms to the right
3x=21
x=21/3
x=7
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