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5/x+4/x=3
We move all terms to the left:
5/x+4/x-(3)=0
Domain of the equation: x!=0We multiply all the terms by the denominator
x∈R
-3*x+5+4=0
We add all the numbers together, and all the variables
-3x+9=0
We move all terms containing x to the left, all other terms to the right
-3x=-9
x=-9/-3
x=+3
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