-4=r-4/2

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Solution for -4=r-4/2 equation: 



-4=r-4/2

We move all terms to the left:

-4-(r-4/2)=0

We add all the numbers together, and all the variables

-(r-2)-4=0

We get rid of parentheses

-r+2-4=0

We add all the numbers together, and all the variables

-1r-2=0

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

-r=2

r=2/-1

r=-2

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