10+9r=-10+4r

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



10+9r=-10+4r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

9r-4r+10+10=0

We add all the numbers together, and all the variables

5r+20=0

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

5r=-20

r=-20/5

r=-4

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