-10r-5r=-20-10r

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Solution for -10r-5r=-20-10r equation: 



-10r-5r=-20-10r

We move all terms to the left:

-10r-5r-(-20-10r)=0

We add all the numbers together, and all the variables

-10r-5r-(-10r-20)=0

We add all the numbers together, and all the variables

-15r-(-10r-20)=0

We get rid of parentheses

-15r+10r+20=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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