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245=58-u
We move all terms to the left:
245-(58-u)=0
We add all the numbers together, and all the variables
-(-1u+58)+245=0
We get rid of parentheses
1u-58+245=0
We add all the numbers together, and all the variables
u+187=0
We move all terms containing u to the left, all other terms to the right
u=-187
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