7j-30=2j-15

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Solution for 7j-30=2j-15 equation: 



7j-30=2j-15

We move all terms to the left:

7j-30-(2j-15)=0

We get rid of parentheses

7j-2j+15-30=0

We add all the numbers together, and all the variables

5j-15=0

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

5j=15

j=15/5

j=3

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