-10=r/2

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Solution for -10=r/2 equation: 



-10=r/2

We move all terms to the left:

-10-(r/2)=0

We add all the numbers together, and all the variables

-(+r/2)-10=0

We get rid of parentheses

-r/2-10=0

We multiply all the terms by the denominator


-r-10*2=0

We add all the numbers together, and all the variables

-1r-20=0

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

-r=20

r=20/-1

r=-20

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