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u/4=3.2
We move all terms to the left:
u/4-(3.2)=0
We add all the numbers together, and all the variables
u/4-3.2=0
We multiply all the terms by the denominator
u-(3.2)*4=0
We add all the numbers together, and all the variables
u-12.8=0
We move all terms containing u to the left, all other terms to the right
u=12.8
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