-21.4=r-4.5

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Solution for -21.4=r-4.5 equation: 



-21.4=r-4.5

We move all terms to the left:

-21.4-(r-4.5)=0

We get rid of parentheses

-r+4.5-21.4=0

We add all the numbers together, and all the variables

-1r-16.9=0

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

-r=16.9

r=16.9/-1

r=-16+0.9/1

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