9=3(j-7)

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Solution for 9=3(j-7) equation: 



9=3(j-7)

We move all terms to the left:

9-(3(j-7))=0



We calculate terms in parentheses: -(3(j-7)), so:

3(j-7)

We multiply parentheses

3j-21

Back to the equation:

-(3j-21)



We get rid of parentheses

-3j+21+9=0

We add all the numbers together, and all the variables

-3j+30=0

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

-3j=-30

j=-30/-3

j=+10

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