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16/9=-8u
We move all terms to the left:
16/9-(-8u)=0
We get rid of parentheses
8u+16/9=0
We multiply all the terms by the denominator
8u*9+16=0
Wy multiply elements
72u+16=0
We move all terms containing u to the left, all other terms to the right
72u=-16
u=-16/72
u=-2/9
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