-2r+4=4(1+-9r)

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Solution for -2r+4=4(1+-9r) equation: 



-2r+4=4(1+-9r)

We move all terms to the left:

-2r+4-(4(1+-9r))=0

We add all the numbers together, and all the variables

-2r-(4(-9r))+4=0



We calculate terms in parentheses: -(4(-9r)), so:

4(-9r)

We multiply parentheses

-36r

Back to the equation:

-(-36r)



We get rid of parentheses

-2r+36r+4=0

We add all the numbers together, and all the variables

34r+4=0

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

34r=-4

r=-4/34

r=-2/17

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