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-8u+2(u+4)=-4
We move all terms to the left:
-8u+2(u+4)-(-4)=0
We add all the numbers together, and all the variables
-8u+2(u+4)+4=0
We multiply parentheses
-8u+2u+8+4=0
We add all the numbers together, and all the variables
-6u+12=0
We move all terms containing u to the left, all other terms to the right
-6u=-12
u=-12/-6
u=+2
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