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6.6u+1.38=6.3u
We move all terms to the left:
6.6u+1.38-(6.3u)=0
We add all the numbers together, and all the variables
6.6u-(+6.3u)+1.38=0
We get rid of parentheses
6.6u-6.3u+1.38=0
We add all the numbers together, and all the variables
0.3u+1.38=0
We move all terms containing u to the left, all other terms to the right
0.3u=-1.38
u=-1.38/0.3
u=-4+0.18/0.3
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