4r+5+4=12

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Solution for 4r+5+4=12 equation: 



4r+5+4=12

We move all terms to the left:

4r+5+4-(12)=0

We add all the numbers together, and all the variables

4r-3=0

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

4r=3

r=3/4

r=3/4

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