45=8(u-90)-21

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Solution for 45=8(u-90)-21 equation: 



45=8(u-90)-21

We move all terms to the left:

45-(8(u-90)-21)=0



We calculate terms in parentheses: -(8(u-90)-21), so:

8(u-90)-21

We multiply parentheses

8u-720-21

We add all the numbers together, and all the variables

8u-741

Back to the equation:

-(8u-741)



We get rid of parentheses

-8u+741+45=0

We add all the numbers together, and all the variables

-8u+786=0

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

-8u=-786

u=-786/-8

u=98+1/4

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