4u-1=-21

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Solution for 4u-1=-21 equation: 



4u-1=-21

We move all terms to the left:

4u-1-(-21)=0

We add all the numbers together, and all the variables

4u+20=0

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

4u=-20

u=-20/4

u=-5

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