Movie tickets cost 10 bucks for adults and 8 bucks for kids. On Friday the total sales from 120 tickets was 1120 bucks how many adult tickets were sold

10a + 8(120-a) = 1120

a = 80

To determine the number of adult tickets sold, we need to set up an equation based on the given information.

Let's assume the number of adult tickets sold as 'A'.

According to the problem, the cost of adult tickets is $10 each, and the total sales from 120 tickets was $1120. Since the total number of tickets sold is 120, we can subtract the number of adult tickets from the total to find the number of kids tickets sold.

The equation to represent the situation is:

A (number of adult tickets) + K (number of kids tickets) = 120

We also know that the cost of adult tickets is $10 each and the cost of kids tickets is $8 each, and the total sales was $1120.

10A (total sales from adult tickets) + 8K (total sales from kids tickets) = 1120

We need to solve this system of equations to find the number of adult tickets sold.

Let's rearrange the first equation to find the value of K:

A + K = 120
K = 120 - A

Substituting the value of K in the second equation:

10A + 8(120 - A) = 1120

Simplifying the equation, we get:

10A + 960 - 8A = 1120
2A + 960 = 1120
2A = 1120 - 960
2A = 160
A = 160 / 2
A = 80

Therefore, 80 adult tickets were sold on Friday.