20=7j-15

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Solution for 20=7j-15 equation: 



20=7j-15

We move all terms to the left:

20-(7j-15)=0

We get rid of parentheses

-7j+15+20=0

We add all the numbers together, and all the variables

-7j+35=0

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

-7j=-35

j=-35/-7

j=+5

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