21(u+11)=504

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Solution for 21(u+11)=504 equation: 



21(u+11)=504

We move all terms to the left:

21(u+11)-(504)=0

We multiply parentheses

21u+231-504=0

We add all the numbers together, and all the variables

21u-273=0

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

21u=273

u=273/21

u=13

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