4800-400r=2000

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Solution for 4800-400r=2000 equation: 



4800-400r=2000

We move all terms to the left:

4800-400r-(2000)=0

We add all the numbers together, and all the variables

-400r+2800=0

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

-400r=-2800

r=-2800/-400

r=+7

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