Alal sold an article at 6% loss. Had he sold it for Tk. 64 more, he would have made a profit of 10%. Then the cost of the article is =?

Question: Alal sold an article at 6% loss. Had he sold it for Tk. 64 more, he would have made a profit of 10%. Then the cost of the article is =?

Solution:
Let, the cost of the article is x taka

Selling price = 0.94x

ATQ,
0.94x + 64 = 1.1x
⇒ 1.1x - 0.94x = 64
⇒ 0.16x = 64
⇒ x = 64/0.16 = 400 taka