-7-(-3p)=21

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Solution for -7-(-3p)=21 equation: 



-7-(-3p)=21

We move all terms to the left:

-7-(-3p)-(21)=0

We add all the numbers together, and all the variables

-(-3p)-28=0

We get rid of parentheses

3p-28=0

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

3p=28

p=28/3

p=9+1/3

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