81=-9(j+9)

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Solution for 81=-9(j+9) equation: 



81=-9(j+9)

We move all terms to the left:

81-(-9(j+9))=0



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

-9(j+9)

We multiply parentheses

-9j-81

Back to the equation:

-(-9j-81)



We get rid of parentheses

9j+81+81=0

We add all the numbers together, and all the variables

9j+162=0

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

9j=-162

j=-162/9

j=-18

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