Answer:
D. x = -1.
Step-by-step explanation:
I have attached an explanation to your problem. Please see the attachment below.
Answer:
7 has been to Australia
9 has not been to the united states
10 has not been to Australia
8 has been to the United States
Answer:
2x + 4
Step-by-step explanation:
I'm guessing there are no exact numbers
home = x + 4
school = x
x + x + 4
2x + 4
<em><u>Explanation</u></em>
Xian has 52 stamps and Kai has 76 stamps.
Xian's club will send him 16 new stamps per month and Kai's club will send him 12 new stamps per month.
Suppose, Xian and Kai will have the same number of stamps after
months.
So, the total number of new stamps for Xian
and the total number of new stamps for Kai 
So, the equation will be......

Thus, Xian and Kai will have the same number of stamps after 6 months.
The number of stamps for each of them will be: 
Answer:
if you add more money
Step-by-step explanation: