u-3.9=9.7

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Solution for u-3.9=9.7 equation: 



u-3.9=9.7

We move all terms to the left:

u-3.9-(9.7)=0

We add all the numbers together, and all the variables

u-13.6=0

We move all terms containing u to the left, all other terms to the right

u=13.6

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