7j+20=3j+40

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Solution for 7j+20=3j+40 equation: 



7j+20=3j+40

We move all terms to the left:

7j+20-(3j+40)=0

We get rid of parentheses

7j-3j-40+20=0

We add all the numbers together, and all the variables

4j-20=0

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

4j=20

j=20/4

j=5

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