Respuesta :

r in (-oo:+oo)

r/3 = 12 // - 12

r/3-12 = 0

1/3*r-12 = 0 // + 12

1/3*r = 12 // : 1/3

r = 12/1/3

r = 36

r = 36
r in (-oo:+oo)

r/3 = 12 // - 12

r/3-12 = 0

1/3*r-12 = 0 // + 12

1/3*r = 12 // : 1/3

r = 12/1/3

r = 36

r = 36

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