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u/8+7.2=-5.6
We move all terms to the left:
u/8+7.2-(-5.6)=0
We add all the numbers together, and all the variables
u/8+12.8=0
We multiply all the terms by the denominator
u+(12.8)*8=0
We add all the numbers together, and all the variables
u+102.4=0
We move all terms containing u to the left, all other terms to the right
u=-102.4
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