4r+5r=-16

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Solution for 4r+5r=-16 equation: 



4r+5r=-16

We move all terms to the left:

4r+5r-(-16)=0

We add all the numbers together, and all the variables

9r+16=0

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

9r=-16

r=-16/9

r=-1+7/9

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