7j+j+j=18

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Solution for 7j+j+j=18 equation: 



7j+j+j=18

We move all terms to the left:

7j+j+j-(18)=0

We add all the numbers together, and all the variables

9j-18=0

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

9j=18

j=18/9

j=2

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