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34=6+4u
We move all terms to the left:
34-(6+4u)=0
We add all the numbers together, and all the variables
-(4u+6)+34=0
We get rid of parentheses
-4u-6+34=0
We add all the numbers together, and all the variables
-4u+28=0
We move all terms containing u to the left, all other terms to the right
-4u=-28
u=-28/-4
u=+7
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