-2.8r+8.3=9.78-6.5r

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Solution for -2.8r+8.3=9.78-6.5r equation: 



-2.8r+8.3=9.78-6.5r

We move all terms to the left:

-2.8r+8.3-(9.78-6.5r)=0

We add all the numbers together, and all the variables

-2.8r-(-6.5r+9.78)+8.3=0

We get rid of parentheses

-2.8r+6.5r-9.78+8.3=0

We add all the numbers together, and all the variables

3.7r-1.48=0

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

3.7r=1.48

r=1.48/3.7

r=1/2.5

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