10r+15=-5

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Solution for 10r+15=-5 equation: 



10r+15=-5

We move all terms to the left:

10r+15-(-5)=0

We add all the numbers together, and all the variables

10r+20=0

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

10r=-20

r=-20/10

r=-2

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