3i is not equivalent to 3 because i is representative for the square root of -1. In reality it is 3(square root of -1) and 3 .
12 1/2 - 5x = 3 1/3
12 1/2 - 3 1/3 = 5x
9 1/6 = 5x
x = (9 1/6) / 5
x = 1 5/6
1 5/6 pounds
Answer: She can make 48 cookies
Step-by-step explanation: 57.6/1.2 = 48