Question

If 1 brick and 1/2 a brick together weigh 1 kg, what is the weigh of two whole bricks in kilos

Answer 1

The answer above is correct

Explanation:

Answer 2

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

`x + y = 1`

We know that obviously x is half of y. so

`x = (1)/(2) y`

Subsitur this for x.

`(1)/(2) y + y = 1`

`(3)/(2) y = 1`

`y = (2)/(3)`

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

`(2)/(3) * 2 = (4)/(3)`