-2=r-2/2

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


r in (-oo:+oo)

-2 = r-(2/2) // - r-(2/2)

2/2-r-2 = 0

-r-1 = 0 // + 1

-r = 1 // * -1

r = -1

r = -1

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