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5u-1.4=10.9
We move all terms to the left:
5u-1.4-(10.9)=0
We add all the numbers together, and all the variables
5u-12.3=0
We move all terms containing u to the left, all other terms to the right
5u=12.3
u=12.3/5
u=2+2.3/5
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