Question

A cheese burger has 200 fewer calories than a large fry. Two cheeseburgers and a large fry have 1100. How many calories are in each item?

Answer 1

y - 200 = cheese burger
y = large fry
2(y - 200) + y = 1100

Answer 2

huh??

Answer 3

Solve for y in that equation.

y - 200 will give you the amount of calories in a cheese burger
and
y will give you the amount of calories in a large fry.

Answer 4

x-y=200?
2x+1y=1100?

Answer 5

Nope. The amount of calories in the two foods aren't being subtracted from each other. It says "A cheese burger has 200 fewer calories than a large fry." So, y - 200 or x - 200. Whichever variable you want as the large fries. Then the large fries are just x or y. There is only one variable in this equation.

Answer 6

im so confued =/

Answer 7

Ok, say x = the calories in the large fry. The variable for calories in the cheeseburger will be x - 200.
Our two variables:
x = large fry
x - 200 = cheese burger.
Now, it says "Two cheeseburgers and a large fry have 1100." So, multiply 2 times the cheese burger calories plus the amount of calories in a large fry to get the total amount of calories.
2(x-200) + x = 1100

Answer 8

so this is a substitution problem?

Answer 9

I'm not sure.

Answer 10

2(x-200) + x = 1100
is the equation then?

Answer 11

is that the equation?

Answer 12

Yes

Answer 13

Thanks :)

Answer 14

Yep!