30=2(u-84)

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Solution for 30=2(u-84) equation: 



30=2(u-84)

We move all terms to the left:

30-(2(u-84))=0



We calculate terms in parentheses: -(2(u-84)), so:

2(u-84)

We multiply parentheses

2u-168

Back to the equation:

-(2u-168)



We get rid of parentheses

-2u+168+30=0

We add all the numbers together, and all the variables

-2u+198=0

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

-2u=-198

u=-198/-2

u=+99

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