**Answer:**

**15 + 1.2x = 2.4x**

**13 pages**

**Step-by-step explanation:**

Let x be the number of pages he needs to create,

∵ In the original programm the time taken by him in each page = 2.4 hours,

So, **the total original time = 2.4x**

Now, In the new program,

The learning time = 15 hours,

While the time per each page = = 1.2 hours,

Thus, **the total new time to create x pages = 15 + 1.2x**

According to the question,

**15 + 1.2x = 2.4x**

Which is the required equation,

Subtract 15 on both sides,

1.2x = 2.4x - 15

Subtract both sides by 2.4x

-1.2x = - 15

x = 12.5 ≈ 13

**Hence, he needs to create 13 pages.**