-r-4r=-10

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



-r-4r=-10

We move all terms to the left:

-r-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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