a certain store sells all maps at one price and all books at another price . on monday the store sold 12 maps and 8 books for a total of $ 38.00 , and on tuesday the store sold 20 maps and 12 books for a total of $ 60.00 . at this store , how much less does a map sell for than a book ?
"12 x + 8 y = 38 20 x + 12 y = 60 multiply eq 1 by 5 and eq 2 by 3 60 x + 40 y = 38 * 5 60 x + 36 y = 60 * 3 subtracting 1 from 2 4 y = 190 - 180 y = 2.5 therefore x = 1.5 difference in price = 1 d"
divide(subtract(60.00, negate(multiply(12, divide(subtract(multiply(38.00, const_4), multiply(60.00, const_2)), subtract(multiply(8, const_4), multiply(12, const_2)))))), 20)