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7=-8/3u
We move all terms to the left:
7-(-8/3u)=0
Domain of the equation: 3u)!=0We get rid of parentheses
u!=0/1
u!=0
u∈R
8/3u+7=0
We multiply all the terms by the denominator
7*3u+8=0
Wy multiply elements
21u+8=0
We move all terms containing u to the left, all other terms to the right
21u=-8
u=-8/21
u=-8/21
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