Question

A big container contains 7 marbles while a small container contains 4 marbles. There are 11 containers and 62 marbles altogether. How many small containers are there?​

Answer 1

Answer:  5

Work Shown

x = number of small containers

11-x = number of large containers

4x = number of marbles from the small containers only

7(11-x) = number of marbles from the large containers only

4x+7(11-x) = total number of marbles

4x+7(11-x) = 62

4x+77-7x = 62

-3x+77 = 62

-3x = 62-77

-3x = -15

x = -15/(-3)

x = 5

There are 5 small containers.