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56=-u+176
We move all terms to the left:
56-(-u+176)=0
We add all the numbers together, and all the variables
-(-1u+176)+56=0
We get rid of parentheses
1u-176+56=0
We add all the numbers together, and all the variables
u-120=0
We move all terms containing u to the left, all other terms to the right
u=120
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