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u+u-15=u+34
We move all terms to the left:
u+u-15-(u+34)=0
We add all the numbers together, and all the variables
2u-(u+34)-15=0
We get rid of parentheses
2u-u-34-15=0
We add all the numbers together, and all the variables
u-49=0
We move all terms containing u to the left, all other terms to the right
u=49
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