228.

Eger $$x = 9$$ we $$y = 13$$ bolsa, onda $$2,4x + 0,13y$$ aňlatmanyň bahasyny tapmaly.

Berlen aňlatmada x we y-yň bahasyny goýaly:

$$2,4 \cdot 9 + 0,13 \cdot 13$$

Amallary ýerine ýetireli:

$$2,4 \cdot 9 = 21,6$$ $$0,13 \cdot 13 = 1,69$$

Soň bolsa alnan netijeleri goşaly:

$$21,6 + 1,69 = 23,29$$

Jogap: $$2,4x + 0,13y$$ aňlatmanyň bahasy $$x = 9$$ we $$y = 13$$ bolanda 23,29-a deňdir.