-400=10(5+7n)

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Solution for -400=10(5+7n) equation: 



-400=10(5+7n)

We move all terms to the left:

-400-(10(5+7n))=0

We add all the numbers together, and all the variables

-(10(7n+5))-400=0



We calculate terms in parentheses: -(10(7n+5)), so:

10(7n+5)

We multiply parentheses

70n+50

Back to the equation:

-(70n+50)



We get rid of parentheses

-70n-50-400=0

We add all the numbers together, and all the variables

-70n-450=0

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

-70n=450

n=450/-70

n=-6+3/7

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