Math
posted by Anonymous .
Jane wishes to buy books for her children. At one shop a book costs sh.400 it is sold with 2 pens costing sh.10 each and another shop sells a book at sh.200 with a pen costing sh.40 each. She is prepared to spend not more than sh.3200 on books and sh.280 on pens. Find the largest number of books she can buy.

Before a math teacher looks at this, you need to show as much as you can toward solving this. What have you done so far?