The Frosty Ice-Cream Shop sells sundaes for $2 and banana splits for $3. On a hot summer day, the shop sold 80 sundaes and banana splits and made $210.

Answer 1

2S+ 3B = 210

S+B = 80

multiply both sides by 2 to get

2S + 2B = 160

subtract 3rd equation from 1st to get

B = 210-180 = 30

B = 30 Banana splits sold

S = 80-30 = 50 Sundaes sold

check the answer

2(30) + 3(50) = 60+150 + 210