Mandy can by 4 containers of yogurt and 3 boxes of crackers for $9.55. she can buy 2 containers of yogurt and 2 boxes of crackers for $5.90. how much does one box of crackers cost?

Answer 1

4Y+3C=9.55 -> 4Y=9.55-3C

2Y+2C=5.90 -> 4Y+4C=11.80 -> 4Y=11.80-4C

9.55-3C=11.80-4C -> 9.55+C=11.80 -> C=2.25