4j-8=12+9

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Solution for 4j-8=12+9 equation: 



4j-8=12+9

We move all terms to the left:

4j-8-(12+9)=0

We add all the numbers together, and all the variables

4j-8-21=0

We add all the numbers together, and all the variables

4j-29=0

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

4j=29

j=29/4

j=7+1/4

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