7=j-13

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Solution for 7=j-13 equation: 



7=j-13

We move all terms to the left:

7-(j-13)=0

We get rid of parentheses

-j+13+7=0

We add all the numbers together, and all the variables

-1j+20=0

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

-j=-20

j=-20/-1

j=+20

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