-5r+-21=-51

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Solution for -5r+-21=-51 equation: 



-5r+-21=-51

We move all terms to the left:

-5r+-21-(-51)=0

We add all the numbers together, and all the variables

-5r+30=0

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

-5r=-30

r=-30/-5

r=+6

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