Respuesta :
Answer: Since the lowest common multiple of 140 and x is 420: because 140 divides into 420 three times, x must contain a 3. Since x contains both 20 and 3 as factors, x is 20 · 3 = 60.
Answer: Since the lowest common multiple of 140 and x is 420: because 140 divides into 420 three times, x must contain a 3. Since x contains both 20 and 3 as factors, x is 20 · 3 = 60.