4r=-5r+9r

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Solution for 4r=-5r+9r equation: 



4r=-5r+9r

We move all terms to the left:

4r-(-5r+9r)=0

We add all the numbers together, and all the variables

4r-(+4r)=0

We get rid of parentheses

4r-4r=0

We add all the numbers together, and all the variables

=0

r=0/1

r=0

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