Answer:
8 stands
Explanation:
Potatoe stands can hold 3 lb
Tomato stands can hold 6 lb
So there are 21 pounds of potatoes and 6 pounds of tomatos
we only need 1 stand for the tomatos (1 stand can hold 6 pounds of tomatoes)
to find how many stands we need for the potatoes we can divide
21 / 3 = 7
so in conclusion we need 7 stands for potatoes and 1 stand for the tomatos
8 stands in all
Hope This Helps! ;)