2(r+9)=4

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



2(r+9)=4

We move all terms to the left:

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

We multiply parentheses

2r+18-4=0

We add all the numbers together, and all the variables

2r+14=0

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

2r=-14

r=-14/2

r=-7

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