20.8=-2.6r

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Solution for 20.8=-2.6r equation: 



20.8=-2.6r

We move all terms to the left:

20.8-(-2.6r)=0

We get rid of parentheses

2.6r+20.8=0

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

2.6r=-20.8

r=-20.8/2.6

r=-8

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