Respuesta :
Answer:
15
Step-by-step explanation:
20 - (3 x 7 - 4 x 4)
20-(21 - 4 x 4)
20-(21 - 16)
20 - (5)
20 - 1 x 5
20 - 5 = 15
Answer:
15
Step-by-step explanation:
20 - (3 x 7 - 4 x 4)
20-(21 - 4 x 4)
20-(21 - 16)
20 - (5)
20 - 1 x 5
20 - 5 = 15