3(j+1)=30

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Solution for 3(j+1)=30 equation: 



3(j+1)=30

We move all terms to the left:

3(j+1)-(30)=0

We multiply parentheses

3j+3-30=0

We add all the numbers together, and all the variables

3j-27=0

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

3j=27

j=27/3

j=9

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