[tex] > resolucao \\ \\ \geqslant fracao \\ \\ \\ > \frac{2}{3} \: \: de \: \: 210 \\ \\ > \frac{210}{3} \times 2 \\ \\ > 70 \times 2 \\ \\ > 70 \\ \\ = = = = = = = = = = = = = = = = = \\ \\ \\ > \frac{1}{7} \: \: de \: \: 210 \\ \\ > \frac{210}{7} \times 1 \\ \\ > 30 \times 1 \\ \\ > 30 \\ \\ \\ = = = = = = = = = = = = = = = = = = = \\ \\ \\ > \frac{2}{3} + \frac{1}{7} > mmc = 21 \\ \\ > \frac{14 + 3}{21} \\ \\ > \frac{17}{21} \\ \\ \\ = = = = = = = = = = = = = = \\ \\ \\ > \frac{21}{21} - \frac{17}{21} \\ \\ > \frac{21 - 17}{21} \\ \\ > \frac{4}{21} \\ \\ \\ \\ > < > < > < > < > < > < > < > > [/tex]
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[tex] > resolucao \\ \\ \geqslant fracao \\ \\ \\ > \frac{2}{3} \: \: de \: \: 210 \\ \\ > \frac{210}{3} \times 2 \\ \\ > 70 \times 2 \\ \\ > 70 \\ \\ = = = = = = = = = = = = = = = = = \\ \\ \\ > \frac{1}{7} \: \: de \: \: 210 \\ \\ > \frac{210}{7} \times 1 \\ \\ > 30 \times 1 \\ \\ > 30 \\ \\ \\ = = = = = = = = = = = = = = = = = = = \\ \\ \\ > \frac{2}{3} + \frac{1}{7} > mmc = 21 \\ \\ > \frac{14 + 3}{21} \\ \\ > \frac{17}{21} \\ \\ \\ = = = = = = = = = = = = = = \\ \\ \\ > \frac{21}{21} - \frac{17}{21} \\ \\ > \frac{21 - 17}{21} \\ \\ > \frac{4}{21} \\ \\ \\ \\ > < > < > < > < > < > < > < > > [/tex]