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-2(1-7p)+8p=-90
We move all terms to the left:
-2(1-7p)+8p-(-90)=0
We add all the numbers together, and all the variables
-2(-7p+1)+8p-(-90)=0
We add all the numbers together, and all the variables
8p-2(-7p+1)+90=0
We multiply parentheses
8p+14p-2+90=0
We add all the numbers together, and all the variables
22p+88=0
We move all terms containing p to the left, all other terms to the right
22p=-88
p=-88/22
p=-4
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