The second and the third one are similar.

**Answer:**

**Step-by-step explanation:**

Nick's age = x years

Lina's age =3*x = 3x

After 6 years,

Lina's age = 3x + 6

Nick's age = x + 6

3x + 6 = 2*(x+6)

3x + 6 = 2*x + 2*6

3x + 6 = 2x + 12 {**Subtract 6 form both sides}**

3x +6 - 6 = 2x + 12 - 6

3x = 2x + 6 **{subtract 2x from both sides}**

3x - 2x = 2x + 6 - 2x

x = 6

Nick's age = 6 years

Lina's age =3*6 = 18 years

1m is approximately 3 feet whereas 1m is approximately 3280 feet. Therefore, the best estimate for the heiht of a desk would be 1 m

<em>Where's the figure?</em>

**<em>∝</em>**<em> Sidhdi</em>