-90=-6(2k-1)

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Solution for -90=-6(2k-1) equation: 



-90=-6(2k-1)

We move all terms to the left:

-90-(-6(2k-1))=0



We calculate terms in parentheses: -(-6(2k-1)), so:

-6(2k-1)

We multiply parentheses

-12k+6

Back to the equation:

-(-12k+6)



We get rid of parentheses

12k-6-90=0

We add all the numbers together, and all the variables

12k-96=0

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

12k=96

k=96/12

k=8

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