[tex]m + n = 50[/tex]
[tex]m \div n = 5[/tex]
[tex]m = 5n[/tex]
[tex]5n + n = 50[/tex]
[tex]6n = 50[/tex]
[tex]n = \frac{50}{6} [/tex]
[tex]n = \frac{25}{3} [/tex]
[tex]m + \frac{25}{3} = 50 \: | \times 3[/tex]
[tex]3m + 25 = 150[/tex]
[tex]3m = 150 - 25[/tex]
[tex]3m = 125[/tex]
[tex]m = \frac{125}{3} [/tex]
