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-4u+8=-8-2u
We move all terms to the left:
-4u+8-(-8-2u)=0
We add all the numbers together, and all the variables
-4u-(-2u-8)+8=0
We get rid of parentheses
-4u+2u+8+8=0
We add all the numbers together, and all the variables
-2u+16=0
We move all terms containing u to the left, all other terms to the right
-2u=-16
u=-16/-2
u=+8
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