9p-4=4p+21

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Solution for 9p-4=4p+21 equation: 



9p-4=4p+21

We move all terms to the left:

9p-4-(4p+21)=0

We get rid of parentheses

9p-4p-21-4=0

We add all the numbers together, and all the variables

5p-25=0

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

5p=25

p=25/5

p=5

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