-90=-9(2j-6)

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Solution for -90=-9(2j-6) equation: 



-90=-9(2j-6)

We move all terms to the left:

-90-(-9(2j-6))=0



We calculate terms in parentheses: -(-9(2j-6)), so:

-9(2j-6)

We multiply parentheses

-18j+54

Back to the equation:

-(-18j+54)



We get rid of parentheses

18j-54-90=0

We add all the numbers together, and all the variables

18j-144=0

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

18j=144

j=144/18

j=8

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