21-3p=-7-5(-7p+2)

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Solution for 21-3p=-7-5(-7p+2) equation: 



21-3p=-7-5(-7p+2)

We move all terms to the left:

21-3p-(-7-5(-7p+2))=0



We calculate terms in parentheses: -(-7-5(-7p+2)), so:

-7-5(-7p+2)

determiningTheFunctionDomain
-5(-7p+2)-7

We multiply parentheses

35p-10-7

We add all the numbers together, and all the variables

35p-17

Back to the equation:

-(35p-17)



We get rid of parentheses

-3p-35p+17+21=0

We add all the numbers together, and all the variables

-38p+38=0

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

-38p=-38

p=-38/-38

p=1

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