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-4(u+1)=2u-40
We move all terms to the left:
-4(u+1)-(2u-40)=0
We multiply parentheses
-4u-(2u-40)-4=0
We get rid of parentheses
-4u-2u+40-4=0
We add all the numbers together, and all the variables
-6u+36=0
We move all terms containing u to the left, all other terms to the right
-6u=-36
u=-36/-6
u=+6
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