-3(2p+1)=21

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Solution for -3(2p+1)=21 equation: 



-3(2p+1)=21

We move all terms to the left:

-3(2p+1)-(21)=0

We multiply parentheses

-6p-3-21=0

We add all the numbers together, and all the variables

-6p-24=0

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

-6p=24

p=24/-6

p=-4

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