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56=8u+8
We move all terms to the left:
56-(8u+8)=0
We get rid of parentheses
-8u-8+56=0
We add all the numbers together, and all the variables
-8u+48=0
We move all terms containing u to the left, all other terms to the right
-8u=-48
u=-48/-8
u=+6
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