Question

Devi pays $10.60 for 4 cheeseburgers and 3 cups of

drink. Amirah pays $3.10 for a cheeseburger and
1
cup of drink. Find the cost of each item.

help me on these please​

Answer 1

Cost of Drink is $1.8

Cost of Cheeseburger is $1.3

Step-by-step explanation:

Let Cups of drink be x

Let Cheeseburgers be y

3x+4y= 10.6 ------> (i)

x+y=3.1 ------> (ii)

Now you can use either substitution method or elimination method. Up to you because the question hasn't specified. I am using substitution method.

(ii)-----> x=3.1-y ------- Put in (i)

3(3.1-y)+4y=10.6

9.3-3y+4y=10.6

y=10.6-9.3

y=1.3 -------- Put in (ii)

x=3.1-y

x=3.1-1.3

x=1.8