[tex]13 \frac{7}{16} = 3 \sqrt{27} + x - ( { - 1 \frac{1}{4} )}^{2} = 3 + x + ({1 \frac{1}{4} )}^{2} = 3 + x + \frac{5}{4} \times \frac{5}{4} =3 + x + \frac{25}{16} = 3 + x + 1 \frac{9}{16} = 3 + x + 1 \frac{3}{4} = 4 \frac{3}{4} + x [/tex]
czyli
[tex]x =13 \frac{7}{16} - 4 \frac{3}{4} = 13 \frac{7}{16} - 4 \frac{12}{16} [/tex]
[tex]x = 14 \frac{23}{16} - 4 \frac{12}{16} [/tex]
[tex]x = 10 \frac{11}{16} [/tex]
