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-748=u+-577
We move all terms to the left:
-748-(u+-577)=0
We add all the numbers together, and all the variables
-(u-577)-748=0
We get rid of parentheses
-u+577-748=0
We add all the numbers together, and all the variables
-1u-171=0
We move all terms containing u to the left, all other terms to the right
-u=171
u=171/-1
u=-171
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