Hepl me what is the answer to this math question

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

2x minus y equals 6, x plus y equals negative 3