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.
