8.2 Check-up Solve each of the following for the two unknowns: 1. In the local hall, there are 25 seats in some rows and 15 seats in the remaining rows. There are 25 rows altogether. When the hall is full, it holds 545 people. Let x be the number of rows with 25 seats Let y be the number of rows with 15 seats. Write down two equations for x and y. Solve the simultaneous equations to find the number of rows of 25 seats and the number of rows of 15 seats. << 25 per row 15 per row​