55=5(u-80)

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Solution for 55=5(u-80) equation: 



55=5(u-80)

We move all terms to the left:

55-(5(u-80))=0



We calculate terms in parentheses: -(5(u-80)), so:

5(u-80)

We multiply parentheses

5u-400

Back to the equation:

-(5u-400)



We get rid of parentheses

-5u+400+55=0

We add all the numbers together, and all the variables

-5u+455=0

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

-5u=-455

u=-455/-5

u=+91

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