-74=2r-4(r-5)

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Solution for -74=2r-4(r-5) equation: 



-74=2r-4(r-5)

We move all terms to the left:

-74-(2r-4(r-5))=0



We calculate terms in parentheses: -(2r-4(r-5)), so:

2r-4(r-5)

We multiply parentheses

2r-4r+20

We add all the numbers together, and all the variables

-2r+20

Back to the equation:

-(-2r+20)



We get rid of parentheses

2r-20-74=0

We add all the numbers together, and all the variables

2r-94=0

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

2r=94

r=94/2

r=47

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