2j+9=-j

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Solution for 2j+9=-j equation: 



2j+9=-j

We move all terms to the left:

2j+9-(-j)=0

We add all the numbers together, and all the variables

2j-(-1j)+9=0

We get rid of parentheses

2j+1j+9=0

We add all the numbers together, and all the variables

3j+9=0

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

3j=-9

j=-9/3

j=-3

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