Respuesta :
Cost of new book= $18
Remaining amount after subtracting the cost of new book = $(26 - 18) = $ 8
Cost of 2 used books = $ 8
Cost of 1 used book = 8/2 = $ 4
Remaining amount after subtracting the cost of new book = $(26 - 18) = $ 8
Cost of 2 used books = $ 8
Cost of 1 used book = 8/2 = $ 4