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64=-u+288
We move all terms to the left:
64-(-u+288)=0
We add all the numbers together, and all the variables
-(-1u+288)+64=0
We get rid of parentheses
1u-288+64=0
We add all the numbers together, and all the variables
u-224=0
We move all terms containing u to the left, all other terms to the right
u=224
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