2(r-1)+38=4r

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Solution for 2(r-1)+38=4r equation: 



2(r-1)+38=4r

We move all terms to the left:

2(r-1)+38-(4r)=0

We add all the numbers together, and all the variables

-4r+2(r-1)+38=0

We multiply parentheses

-4r+2r-2+38=0

We add all the numbers together, and all the variables

-2r+36=0

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

-2r=-36

r=-36/-2

r=+18

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