-3(p+3)=21

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Solution for -3(p+3)=21 equation: 



-3(p+3)=21

We move all terms to the left:

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

We multiply parentheses

-3p-9-21=0

We add all the numbers together, and all the variables

-3p-30=0

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

-3p=30

p=30/-3

p=-10

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