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28=256+4p
We move all terms to the left:
28-(256+4p)=0
We add all the numbers together, and all the variables
-(4p+256)+28=0
We get rid of parentheses
-4p-256+28=0
We add all the numbers together, and all the variables
-4p-228=0
We move all terms containing p to the left, all other terms to the right
-4p=228
p=228/-4
p=-57
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