[tex]a,b-nr.[/tex]
[tex]a - b = 572[/tex]
[tex] \frac{a}{b} = \frac{5}{9} [/tex]
[tex]9a = 5b[/tex]
[tex]a = \frac{5b}{9} [/tex]
[tex] \frac{5b}{9} - b = 572 \: | \times 9[/tex]
[tex]5b - 9b = 5148[/tex]
[tex] - 4b = 5148 \: | \div ( - 4)[/tex]
[tex]b = - 1287[/tex]
[tex]a = \frac{5b}{9} [/tex]
[tex]a = \frac{5 \times ( - 1287)}{9} [/tex]
[tex]a = \frac{ - 6435}{9} [/tex]
[tex]a = - \frac{6435}{9} [/tex]
[tex]a = - 715[/tex]
