21p+9=15p+3

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Solution for 21p+9=15p+3 equation: 



21p+9=15p+3

We move all terms to the left:

21p+9-(15p+3)=0

We get rid of parentheses

21p-15p-3+9=0

We add all the numbers together, and all the variables

6p+6=0

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

6p=-6

p=-6/6

p=-1

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