3r+13=-5

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Solution for 3r+13=-5 equation: 



3r+13=-5

We move all terms to the left:

3r+13-(-5)=0

We add all the numbers together, and all the variables

3r+18=0

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

3r=-18

r=-18/3

r=-6

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