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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

6p-(p+21)-21+7=0

We get rid of parentheses

6p-p-21-21+7=0

We add all the numbers together, and all the variables

5p-35=0

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

5p=35

p=35/5

p=7

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