-21+3p=-3(p-3)+6

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Solution for -21+3p=-3(p-3)+6 equation: 



-21+3p=-3(p-3)+6

We move all terms to the left:

-21+3p-(-3(p-3)+6)=0



We calculate terms in parentheses: -(-3(p-3)+6), so:

-3(p-3)+6

We multiply parentheses

-3p+9+6

We add all the numbers together, and all the variables

-3p+15

Back to the equation:

-(-3p+15)



We get rid of parentheses

3p+3p-15-21=0

We add all the numbers together, and all the variables

6p-36=0

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

6p=36

p=36/6

p=6

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