 Hello and welcome to the session. In this session we are going to discuss the following question and the question says that All varieties of pan pizzas cost 8 dollars. Maria organizes a pizza party at her home and orders x tomato pizzas, y onion pizzas and z capsicum pizzas. Find the cost of the pizzas if she orders for 2 tomato pizzas, 3 onion pizzas and 4 capsicum pizzas. In this question, cost of all varieties of pan pizzas is given as 8 dollars. Maria organizes a pizza party at her home and she orders for 2 tomato pizzas, 3 onion pizzas and 4 capsicum pizzas. And we have to find the total cost of all these pizzas. Let us now go into the solution. We are given that cost of each pizza is equal to 8 dollars. And it is given that Maria orders x tomato pizzas, y onion pizzas and z capsicum pizzas. Now, number of tomato pizzas ordered is given as x, number of onion pizzas ordered is given as y and number of capsicum pizzas ordered is given as z. And cost of each pizza is given as 8 dollars. Therefore cost of tomato pizza will be equal to 8 x x that is 8 x dollars. Similarly cost of onion pizza will be equal to 8 x y that is 8 y dollars. And cost of capsicum pizza will be equal to 8 x z that is 8 z dollars. Hence total cost is equal to 8 x plus 8 y plus 8 z dollars. This can also be written as 8 x plus y plus z dollars by using distributive property. We can find this expression using another method as the cost of all types of pizzas is the same. Therefore total cost will be equal to 8 dollars into total number of pizzas that is x plus y plus z that is number of tomato pizzas plus number of onion pizzas plus number of capsicum pizzas. And therefore we get the total cost as 8 into x plus y plus z dollars. Now if the number of tomato pizzas is given as 2, onion pizzas is given as 3 and capsicum pizzas is given as 4. And we know that the total cost is given by the expression that is 8 into x plus y plus z. Therefore the total cost would be equal to 8 into x plus y plus z dollars. And here the value of x is given as 2, the value of y is 3 and z is equal to 4. So we get the total cost as 8 into 2 plus 3 plus 4 dollars that is 8 into 9 dollars which is equal to 72 dollars. Therefore total cost is given by 72 dollars which is the required answer. This completes our session. Hope you enjoyed this session.