r-2(r-9)+4=5

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Solution for r-2(r-9)+4=5 equation: 



r-2(r-9)+4=5

We move all terms to the left:

r-2(r-9)+4-(5)=0

We add all the numbers together, and all the variables

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

We multiply parentheses

r-2r+18-1=0

We add all the numbers together, and all the variables

-1r+17=0

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

-r=-17

r=-17/-1

r=+17

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