2u-1=-21

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Solution for 2u-1=-21 equation: 



2u-1=-21

We move all terms to the left:

2u-1-(-21)=0

We add all the numbers together, and all the variables

2u+20=0

We move all terms containing u to the left, all other terms to the right

2u=-20

u=-20/2

u=-10

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