20-j=-3(-3j+20)

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Solution for 20-j=-3(-3j+20) equation: 



20-j=-3(-3j+20)

We move all terms to the left:

20-j-(-3(-3j+20))=0

We add all the numbers together, and all the variables

-1j-(-3(-3j+20))+20=0



We calculate terms in parentheses: -(-3(-3j+20)), so:

-3(-3j+20)

We multiply parentheses

9j-60

Back to the equation:

-(9j-60)



We get rid of parentheses

-1j-9j+60+20=0

We add all the numbers together, and all the variables

-10j+80=0

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

-10j=-80

j=-80/-10

j=+8

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