-140=4(5-5n)

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Solution for -140=4(5-5n) equation: 



-140=4(5-5n)

We move all terms to the left:

-140-(4(5-5n))=0

We add all the numbers together, and all the variables

-(4(-5n+5))-140=0



We calculate terms in parentheses: -(4(-5n+5)), so:

4(-5n+5)

We multiply parentheses

-20n+20

Back to the equation:

-(-20n+20)



We get rid of parentheses

20n-20-140=0

We add all the numbers together, and all the variables

20n-160=0

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

20n=160

n=160/20

n=8

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