Respuesta :

Answer:

A cookie costs 1 dollar. A brownie costs 2 dollars.

Step-by-step explanation:

C = Cookie B = Brownie

Your two equations:

3c + 2b =7

5c + 4b = 13

Make both equations have an equivalent section:

2(3c + 2b = 7)

6c + 4b = 14

5c + 4b = 13

c = 1

To find B's value:

3c + 2b = 7

3 x 1 + 2b = 7

3 + 2b = 7

2b =4

b =2

Hope this helps.

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