She has $20 she can use so the limit of money is 20. 7*2.50=17.5 and 4*.50=2 is she’d be using $19.50 she has 0.50 left so you would divide 0.50 by 0.12 which is 4.16 so she could get 4 pencils.
This is the equation 185+185(2)+185-50 185+370+185-50 (you multiply 185 times 2 first) 370+370-50 (you add 185 to 185) 740-50 (you add 370 to 370) 740-50=690 There were 690 visitors during these three days.
