Answer:
6
Step-by-step explanation:
First, subtract 9 on both sides:
d+9-9=15-9
d=6
Hope this helped!
Answer:
bottom left :)
Step-by-step explanation:
Answer:
a+7
Step-by-step explanation:
2 + 5 = 7
7+a or a+7
Answer:
20 adults and 10 children
Step-by-step explanation:
We need to find the total amount of adults and children for 30 total people (adults + children) and only 100$ for them. 30 adults is 120$. We need to take off double the amount of money that would bring it to 100$ because the cost for each child is half of an adult. That way, we have 80$ of adults, and when we fill in the rest with children, we get to 100$ total and 30 total people.
