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238=54-u
We move all terms to the left:
238-(54-u)=0
We add all the numbers together, and all the variables
-(-1u+54)+238=0
We get rid of parentheses
1u-54+238=0
We add all the numbers together, and all the variables
u+184=0
We move all terms containing u to the left, all other terms to the right
u=-184
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