164=-4(-1+8r)

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Solution for 164=-4(-1+8r) equation: 



164=-4(-1+8r)

We move all terms to the left:

164-(-4(-1+8r))=0

We add all the numbers together, and all the variables

-(-4(8r-1))+164=0



We calculate terms in parentheses: -(-4(8r-1)), so:

-4(8r-1)

We multiply parentheses

-32r+4

Back to the equation:

-(-32r+4)



We get rid of parentheses

32r-4+164=0

We add all the numbers together, and all the variables

32r+160=0

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

32r=-160

r=-160/32

r=-5

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