Răspuns:
Explicație pas cu pas:
[tex]\frac{a}{b} = \frac{7}{1} => a = 7*b\\\\\frac{b}{c} = \frac{5}{1} => b = 5*c => c = \frac{b}{5} \\\\\frac{a}{c} = \frac{7 * b}{\frac{b}{5}} = \frac{7 *b}{1} : \frac{b}{5} = \frac{7 * b}{1} * \frac{5}{b} = \frac{35}{1}[/tex]
