9.21=u-(-2.19)

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Solution for 9.21=u-(-2.19) equation: 



9.21=u-(-2.19)

We move all terms to the left:

9.21-(u-(-2.19))=0



We calculate terms in parentheses: -(u-(-2.19)), so:

u-(-2.19)

We add all the numbers together, and all the variables

u+2.19

Back to the equation:

-(u+2.19)



We get rid of parentheses

-u-2.19+9.21=0

We add all the numbers together, and all the variables

-1u+7.02=0

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

-u=-7.02

u=-7.02/-1

u=7+0.02/1

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