[tex]a,b-nr.[/tex]
[tex] \frac{a}{2} = \frac{b}{3} [/tex]
[tex]3a = 2b[/tex]
[tex]a = \frac{2b}{3} [/tex]
[tex]b = a + 58[/tex]
[tex]b = \frac{2b}{3} + 58 \: | \times 3[/tex]
[tex]3b = 2b + 174[/tex]
[tex]3b - 2b = 174[/tex]
[tex]b = 174[/tex]
[tex]a = \frac{2b}{3} [/tex]
[tex]a = \frac{2 \times 174}{3} [/tex]
[tex]a = \frac{348}{3} [/tex]
[tex]a = 116[/tex]