Answer:

10 1/2

Step-by-step explanation:

1 1/2 = 3/2 - one box

3/2 * 7 = 21/2 = 10 1/2 - 7 boxes

Answer:

10 .5 kg of nails is holded by the seven boxes

Step-by-step explanation:

1.5 X 7 = 10.5