Please help me with these two asap please

What is the quotient of -3/8and-1/3?

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?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.