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5.4u-5.1=-3.25
We move all terms to the left:
5.4u-5.1-(-3.25)=0
We add all the numbers together, and all the variables
5.4u-1.85=0
We move all terms containing u to the left, all other terms to the right
5.4u=1.85
u=1.85/5.4
u=1/2.9189189189189
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