4+7r-r=-20

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Solution for 4+7r-r=-20 equation: 



4+7r-r=-20

We move all terms to the left:

4+7r-r-(-20)=0

We add all the numbers together, and all the variables

6r+24=0

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

6r=-24

r=-24/6

r=-4

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