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0.4u+0.15=0.93
We move all terms to the left:
0.4u+0.15-(0.93)=0
We add all the numbers together, and all the variables
0.4u-0.78=0
We move all terms containing u to the left, all other terms to the right
0.4u=0.78
u=0.78/0.4
u=1+0.38/0.4
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