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2u+1.4u-9.2=-4
We move all terms to the left:
2u+1.4u-9.2-(-4)=0
We add all the numbers together, and all the variables
3.4u-5.2=0
We move all terms containing u to the left, all other terms to the right
3.4u=5.2
u=5.2/3.4
u=1+1/1.8888888888889
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