## Task B-1.2.

Matko collects stickers with portraits of athletes that are sold in packs of 5 stickers, and one pack costs 7 kuna. He gave $30 \%$ of his stickers to his younger brother, then his mother bought Matko 4 more packs of stickers. After that, Matko gave his brother a quarter of his current number of stickers. With 70 kuna that the brothers received from their grandmother, they bought packs of stickers and divided them equally. How many stickers does Matko have now, if he has two more than at the beginning?
## Solution.

Let Matko initially have $x$ stickers.

After giving his brother $30\%$ of the stickers, he is left with $70\%$, which is $0.7x$.

From his mother, he received an additional $4 \cdot 5 = 20$ stickers, so he has $0.7x + 20$ stickers.

1 point

Then he gave a quarter of his stickers to his brother, leaving him with $\frac{3}{4}(0.7x + 20)$ stickers.

1 point

For 70 kn, he can buy 10 packs of 5 stickers each, so 50 stickers, and he shares them with his brother, so he gets 25 more stickers.

Therefore, the equation to solve is

$$
\frac{3}{4}(0.7x + 20) + 25 = x + 2.
$$

The solution to this equation is $x = 80$. 1 point

Matko has 82 stickers. 1 point