9r-7r-4=16

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Solution for 9r-7r-4=16 equation: 



9r-7r-4=16

We move all terms to the left:

9r-7r-4-(16)=0

We add all the numbers together, and all the variables

2r-20=0

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

2r=20

r=20/2

r=10

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