Final answer:
The equation to find the price per bread slice, given the total lunch cost was $12, is 1.5t + 6b = 12, where t is the cost per pound of turkey, and b is the price per bread slice.
Step-by-step explanation:
The question involves finding the price per bread based on the total cost of lunches. Mr. Peabody's daughters each want 1/2 a pound of turkey and 2 slices of bread. The total cost is $12, and we want to find the cost t dollars per pound for the turkey. To set up the equation, let b represent the price per slice of bread. Since there are 3 daughters, we would purchase 1.5 pounds of turkey (0.5 pound per daughter) and 6 slices of bread (2 per daughter).
The total cost for the turkey is 1.5t, and the total cost for the bread is 6b. The equation representing the total cost is:
1.5t + 6b = 12