Answer :
a = 5 * c / b
Ann can buy 5 bags, so 5 * c is the total kg of soil she can buy.
If each box holds b kg of soil, then she can fill 5 * c / b boxes.
Ann can buy 5 bags, so 5 * c is the total kg of soil she can buy.
If each box holds b kg of soil, then she can fill 5 * c / b boxes.