The number was increased 3 times, while it increased by 30 find this number.

Let’s denote the required number equal to X.
The required number increased by 3 times is equal to:
3 * H.
The required number increased by 30 is equal to:
X + 30.
According to the conditions of the problem, these values are equal. Let’s equalize them and we will solve the resulting equation:
3 * X = X + 30;
3 * X – X = 30;
2 * X = 30;
X = 30/2;
X = 15.
Answer: the required number is 15.