21=2u-33

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Solution for 21=2u-33 equation: 



21=2u-33

We move all terms to the left:

21-(2u-33)=0

We get rid of parentheses

-2u+33+21=0

We add all the numbers together, and all the variables

-2u+54=0

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

-2u=-54

u=-54/-2

u=+27

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