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86=264-u
We move all terms to the left:
86-(264-u)=0
We add all the numbers together, and all the variables
-(-1u+264)+86=0
We get rid of parentheses
1u-264+86=0
We add all the numbers together, and all the variables
u-178=0
We move all terms containing u to the left, all other terms to the right
u=178
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