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176=102-u
We move all terms to the left:
176-(102-u)=0
We add all the numbers together, and all the variables
-(-1u+102)+176=0
We get rid of parentheses
1u-102+176=0
We add all the numbers together, and all the variables
u+74=0
We move all terms containing u to the left, all other terms to the right
u=-74
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