20=u+2

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Solution for 20=u+2 equation: 



20=u+2

We move all terms to the left:

20-(u+2)=0

We get rid of parentheses

-u-2+20=0

We add all the numbers together, and all the variables

-1u+18=0

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

-u=-18

u=-18/-1

u=+18

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