Respuesta:
4
Explicación paso a paso:
16 + 12 = 20 + 2R
28 = 20 +2R
8 = 2R
4 = R
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Respuesta:
4
Explicación paso a paso:
16 + 12 = 20 + 2R
28 = 20 +2R
8 = 2R
4 = R