The number of customers at yummy smoothies varies throughout the day. during the lunch rush on saturday, there were 120 customers at yummy smoothies. the number of customers at yummy smoothies during dinner time was 10 customers fewer than the number during breakfast. the number of customers at yummy smoothies during lunch was 3 times more than during breakfast. how many people were at yummy smoothies during breakfast? how many people were at yummy smoothies during dinner? let d represent the number of customers at yummy smoothies during dinner and b represent the number of customers at yummy smoothies during breakfast.

use tape diagrams to solve the problem.