Question

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. problema 17:)))) ​

Answer 1

Răspuns:

Notam cu x creioanele negre.

$\frac{10}{100} \times 38 = \frac{20}{100} \times x \\ \frac{38}{10} = \frac{x}{5} \\ x = \frac{38 \times 5}{10} \\ x = 19$

Notam cu y creioanele verzi.

$\frac{10}{100} \times 38 = \frac{25}{100} \times y \\ \frac{38}{10} = \frac{y}{4} \\ y = \frac{4 \times 38}{10} \\ y = \frac{152}{10} \\ y = \frac{76}{5}$