[tex] \frac{a}{7} = \frac{5}{3} \\ = > a = \frac{7 \times 5}{3} = \frac{35}{3} = 11.(6) \\ a + \frac{7}{7} = 11.(6) + 1 = 11 \frac{6}{9} + 1 \\ = \frac{11 \times 9 + 6}{9} + 1 = \frac{105}{9} + 1 \\ = \frac{105}{9} + \frac{9}{9} = \frac{105 + 9}{9} = \frac{114}{9 } = \frac{38}{3} [/tex]
coroana?
