(r+2)/3-(r-2)/3

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Solution for (r+2)/3-(r-2)/3 equation: 


r in (-oo:+oo)

(r+2)/3-((r-2)/3) = 0

(r+2)/3+(-1*(r-2))/3 = 0

r-1*(r-2)+2 = 0

4 = 0

4/3 = 0

4/3 = 0 // * 3

4 = 0

r belongs to the empty set

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