3p+21-12=15p-3

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Solution for 3p+21-12=15p-3 equation: 



3p+21-12=15p-3

We move all terms to the left:

3p+21-12-(15p-3)=0

We add all the numbers together, and all the variables

3p-(15p-3)+9=0

We get rid of parentheses

3p-15p+3+9=0

We add all the numbers together, and all the variables

-12p+12=0

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

-12p=-12

p=-12/-12

p=1

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