5=21+2p

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Solution for 5=21+2p equation: 



5=21+2p

We move all terms to the left:

5-(21+2p)=0

We add all the numbers together, and all the variables

-(2p+21)+5=0

We get rid of parentheses

-2p-21+5=0

We add all the numbers together, and all the variables

-2p-16=0

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

-2p=16

p=16/-2

p=-8

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