-400=-8(1-7p)

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Solution for -400=-8(1-7p) equation: 



-400=-8(1-7p)

We move all terms to the left:

-400-(-8(1-7p))=0

We add all the numbers together, and all the variables

-(-8(-7p+1))-400=0



We calculate terms in parentheses: -(-8(-7p+1)), so:

-8(-7p+1)

We multiply parentheses

56p-8

Back to the equation:

-(56p-8)



We get rid of parentheses

-56p+8-400=0

We add all the numbers together, and all the variables

-56p-392=0

We move all terms containing p to the left, all other terms to the right

-56p=392

p=392/-56

p=-7

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