Answer:
4/3 kg
Explanation:
Let x represent a half brick, let y represent a 1 brick.
We know that 1 brick and 1/2 brick weigh 1 kg. so we represent this as

We know that obviously x is half of y. so

Subsitur this for x.



This means one block weight 2/3 kg. So how much 2 weigh.
