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28=7(p-4)
We move all terms to the left:
28-(7(p-4))=0
We calculate terms in parentheses: -(7(p-4)), so:We get rid of parentheses
7(p-4)
We multiply parentheses
7p-28
Back to the equation:
-(7p-28)
-7p+28+28=0
We add all the numbers together, and all the variables
-7p+56=0
We move all terms containing p to the left, all other terms to the right
-7p=-56
p=-56/-7
p=+8
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