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8=-4/9u
We move all terms to the left:
8-(-4/9u)=0
Domain of the equation: 9u)!=0We get rid of parentheses
u!=0/1
u!=0
u∈R
4/9u+8=0
We multiply all the terms by the denominator
8*9u+4=0
Wy multiply elements
72u+4=0
We move all terms containing u to the left, all other terms to the right
72u=-4
u=-4/72
u=-1/18
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