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34=u/2+13
We move all terms to the left:
34-(u/2+13)=0
We get rid of parentheses
-u/2-13+34=0
We multiply all the terms by the denominator
-u-13*2+34*2=0
We add all the numbers together, and all the variables
-1u+42=0
We move all terms containing u to the left, all other terms to the right
-u=-42
u=-42/-1
u=+42
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