Is –2,823,680 − 8,957,599 positive or negative?

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

Can someone me with this problem i don't understand i need

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x