8=u-12

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Solution for 8=u-12 equation: 



8=u-12

We move all terms to the left:

8-(u-12)=0

We get rid of parentheses

-u+12+8=0

We add all the numbers together, and all the variables

-1u+20=0

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

-u=-20

u=-20/-1

u=+20

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