Respuesta:
1/2× (50/30 - 21/30) - 3/4 (15/5 - 1/5)
1/2× 29/30 -3/4 × 14/5
29/60 -42/20=29/60 - 126/60= -97/60
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Respuesta:
1/2× (50/30 - 21/30) - 3/4 (15/5 - 1/5)
1/2× 29/30 -3/4 × 14/5
29/60 -42/20=29/60 - 126/60= -97/60