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-8(3+p)-1=-81
We move all terms to the left:
-8(3+p)-1-(-81)=0
We add all the numbers together, and all the variables
-8(p+3)-1-(-81)=0
We add all the numbers together, and all the variables
-8(p+3)+80=0
We multiply parentheses
-8p-24+80=0
We add all the numbers together, and all the variables
-8p+56=0
We move all terms containing p to the left, all other terms to the right
-8p=-56
p=-56/-8
p=+7
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