21p-4=12p+7-2

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Solution for 21p-4=12p+7-2 equation: 



21p-4=12p+7-2

We move all terms to the left:

21p-4-(12p+7-2)=0

We add all the numbers together, and all the variables

21p-(12p+5)-4=0

We get rid of parentheses

21p-12p-5-4=0

We add all the numbers together, and all the variables

9p-9=0

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

9p=9

p=9/9

p=1

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