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3-11u=u-13
We move all terms to the left:
3-11u-(u-13)=0
We get rid of parentheses
-11u-u+13+3=0
We add all the numbers together, and all the variables
-12u+16=0
We move all terms containing u to the left, all other terms to the right
-12u=-16
u=-16/-12
u=1+1/3
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