10-5r=12-9r

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Solution for 10-5r=12-9r equation: 



10-5r=12-9r

We move all terms to the left:

10-5r-(12-9r)=0

We add all the numbers together, and all the variables

-5r-(-9r+12)+10=0

We get rid of parentheses

-5r+9r-12+10=0

We add all the numbers together, and all the variables

4r-2=0

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

4r=2

r=2/4

r=1/2

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