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8/u+4=-5
We move all terms to the left:
8/u+4-(-5)=0
Domain of the equation: u!=0We add all the numbers together, and all the variables
u∈R
8/u+9=0
We multiply all the terms by the denominator
9*u+8=0
We add all the numbers together, and all the variables
9u+8=0
We move all terms containing u to the left, all other terms to the right
9u=-8
u=-8/9
u=-8/9
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