Step-by-step explanation:
here you go!
so basically x = 9 cars
21/2 is what you should get if you divide those two
x + 4 = 15
- 4 -4
x = 11
You would subtract 4 because you need to isolate the x to get the value of x. You would subtract it to both sides because whatever you do on one side, you have to do it to the other side.
Answer:
2000
Step-by-step explanation: