2=j-21

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Solution for 2=j-21 equation: 



2=j-21

We move all terms to the left:

2-(j-21)=0

We get rid of parentheses

-j+21+2=0

We add all the numbers together, and all the variables

-1j+23=0

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

-j=-23

j=-23/-1

j=+23

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