Find the value of X, I need help solving this

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?