9r=10r-4

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Solution for 9r=10r-4 equation: 



9r=10r-4

We move all terms to the left:

9r-(10r-4)=0

We get rid of parentheses

9r-10r+4=0

We add all the numbers together, and all the variables

-1r+4=0

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

-r=-4

r=-4/-1

r=+4

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