3r/3r=1

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Solution for 3r/3r=1 equation: 


r in (-oo:+oo)

((3*r)/3)*r = 1 // - 1

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

1*r^2 = 1 // : 1

r^2 = 1

r^2 = 1 // ^ 1/2

abs(r) = 1

r = 1 or r = -1

r in { 1, -1 }

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