[tex] \frac{a}{b} = \frac{3}{4} [/tex]
[tex]a = \frac{3b}{4} [/tex]
[tex]b - a = 11[/tex]
[tex] \frac{4b}{4} - \frac{3b}{4} = 11[/tex]
[tex] \frac{b}{4} = 11[/tex]
[tex]b = 4 \times 11 = 44[/tex]
[tex]a = \frac{3 \times 44}{4} = 3 \times 11 = 33[/tex]
