Question

At Wendy's a cheeseburger has 200 fewer calories than a large fries. Two cheeseburgers are a large fries have 1100 calories. How many calories are in each item? Let c represent the number of calories in a cheeseburger and let f represent the number of calories in an order of fries.

Answer 1

c = f - 200
2c + f = 1100
add these together and you have
3c = 900
c = 300
so, f = 500