-21-7p=-4(2p+7)

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Solution for -21-7p=-4(2p+7) equation: 



-21-7p=-4(2p+7)

We move all terms to the left:

-21-7p-(-4(2p+7))=0



We calculate terms in parentheses: -(-4(2p+7)), so:

-4(2p+7)

We multiply parentheses

-8p-28

Back to the equation:

-(-8p-28)



We get rid of parentheses

-7p+8p+28-21=0

We add all the numbers together, and all the variables

p+7=0

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

p=-7

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