4r+5r=4r-10

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



4r+5r=4r-10

We move all terms to the left:

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

We add all the numbers together, and all the variables

9r-(4r-10)=0

We get rid of parentheses

9r-4r+10=0

We add all the numbers together, and all the variables

5r+10=0

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

5r=-10

r=-10/5

r=-2

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