21=6j+3

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Solution for 21=6j+3 equation: 



21=6j+3

We move all terms to the left:

21-(6j+3)=0

We get rid of parentheses

-6j-3+21=0

We add all the numbers together, and all the variables

-6j+18=0

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

-6j=-18

j=-18/-6

j=+3

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