2.15r+8.50=30

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Solution for 2.15r+8.50=30 equation: 



2.15r+8.50=30

We move all terms to the left:

2.15r+8.50-(30)=0

We add all the numbers together, and all the variables

2.15r-21.5=0

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

2.15r=21.5

r=21.5/2.15

r=10

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