7p-9=12

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Solution for 7p-9=12 equation: 



7p-9=12

We move all terms to the left:

7p-9-(12)=0

We add all the numbers together, and all the variables

7p-21=0

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

7p=21

p=21/7

p=3

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