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-3.68=u/3+4
We move all terms to the left:
-3.68-(u/3+4)=0
We get rid of parentheses
-u/3-4-3.68=0
We multiply all the terms by the denominator
-u-4*3-(3.68)*3=0
We add all the numbers together, and all the variables
-1u-23.04=0
We move all terms containing u to the left, all other terms to the right
-u=23.04
u=23.04/-1
u=-23+0.039999999999999/1
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