carolyn makes and sells necklaces. the material to make each neckalce costs $3.20. she has 12 necklaces to sell and wants to make a total profit of $54. the following equation describes the situation. 12 (x minus 3.20) = 54
carolyn found that x = 7.7 and determined that she will make a profit of $7.70 on each necklace . which error did carolyn make?