Respuesta :
Answer:
140
Step-by-step explanation:
140 is the first multiple that all 3 numbers share.
140
When finding the multiples of 7,10, and 20, the first number you see they all have in common besides 1, is 140
When finding the multiples of 7,10, and 20, the first number you see they all have in common besides 1, is 140