sally had 186 ponds to spend on 6 books.After buying them she had 18 pounds.How much did each book cost?
The answer is 28 pounds per each book. You first minus 18 from 186 because they are extra pounds which is 168 pounds left then you divide 168 by 6 (168 ÷6) which results in exactly 28 pounds left.
To work this out you subtract 18 from 186 because this is the amount you have left; 186-18=168 You the divide 168 by 6 because this is how many books you buy; 168/6=28 This means that your answer is £28 per book. Hope this helped!