Why is this true 9a=11a-2a​

9a = 11a - 2a

9a = 9a

Step-by-step explanation:

9a = 11a - 2a

11 - 2 = 9

Similarly, 11a - 2a = 9a

This is true because , 11a subtract the 2a equals 9a.

You need to look at this chart The system of equations below represents the number of people and total sales for the county fair on Tuesday, where x represents the number of child tickets and y represents the number of adult tickets. you need to take the amount of money you get for adult tickets only then divid it by seven and that is you answer