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121=-u+177
We move all terms to the left:
121-(-u+177)=0
We add all the numbers together, and all the variables
-(-1u+177)+121=0
We get rid of parentheses
1u-177+121=0
We add all the numbers together, and all the variables
u-56=0
We move all terms containing u to the left, all other terms to the right
u=56
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