9r-10=4r+5

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Solution for 9r-10=4r+5 equation: 



9r-10=4r+5

We move all terms to the left:

9r-10-(4r+5)=0

We get rid of parentheses

9r-4r-5-10=0

We add all the numbers together, and all the variables

5r-15=0

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

5r=15

r=15/5

r=3

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