[tex] \geqslant resolucao \\ \\ \\ 3 \: \: . \: \: 5 \: \: . \: \: x \\ 15 \: \: . \: \: y \: \: . \: \: 45 \\ \\ \frac{3}{15} = \frac{5}{y} \\ \\ 3y = 5 \times 15 \\ \\ 3y = 75 \\ \\ y = \frac{75}{3} \\ \\ y = 25 \\ \\ = = = = = = = = = = = = = = = = = = = = = = \\ \\ \\ \frac{5}{25} = \frac{x}{45} \\ \\ 25x = 5 \times 45 \\ \\ 25x = 225 \\ \\ x = \frac{225}{25} \\ \\ x = 9 \\ \\ > < > < > < > < > < > < > < > [/tex]
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[tex] \geqslant resolucao \\ \\ \\ 3 \: \: . \: \: 5 \: \: . \: \: x \\ 15 \: \: . \: \: y \: \: . \: \: 45 \\ \\ \frac{3}{15} = \frac{5}{y} \\ \\ 3y = 5 \times 15 \\ \\ 3y = 75 \\ \\ y = \frac{75}{3} \\ \\ y = 25 \\ \\ = = = = = = = = = = = = = = = = = = = = = = \\ \\ \\ \frac{5}{25} = \frac{x}{45} \\ \\ 25x = 5 \times 45 \\ \\ 25x = 225 \\ \\ x = \frac{225}{25} \\ \\ x = 9 \\ \\ > < > < > < > < > < > < > < > [/tex]
Resposta > letra ( C )