-124=4(1-4r)

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Solution for -124=4(1-4r) equation: 



-124=4(1-4r)

We move all terms to the left:

-124-(4(1-4r))=0

We add all the numbers together, and all the variables

-(4(-4r+1))-124=0



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

4(-4r+1)

We multiply parentheses

-16r+4

Back to the equation:

-(-16r+4)



We get rid of parentheses

16r-4-124=0

We add all the numbers together, and all the variables

16r-128=0

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

16r=128

r=128/16

r=8

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