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12=20+3p
We move all terms to the left:
12-(20+3p)=0
We add all the numbers together, and all the variables
-(3p+20)+12=0
We get rid of parentheses
-3p-20+12=0
We add all the numbers together, and all the variables
-3p-8=0
We move all terms containing p to the left, all other terms to the right
-3p=8
p=8/-3
p=-2+2/3
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