-3r+-r=-16

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Solution for -3r+-r=-16 equation: 



-3r+-r=-16

We move all terms to the left:

-3r+-r-(-16)=0

We add all the numbers together, and all the variables

-4r+16=0

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

-4r=-16

r=-16/-4

r=+4

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