[tex] (x+\frac{2}{3}= \frac{3}{2})(x+ \frac{2}{3}= \frac{3}{2})
[/tex]
([tex](\frac{x+4}{6}=\frac{9}{6})(\frac{x+4}{6}=\frac{9}{6})
(6x+24=54)(6x+24=54)
(6x+24-54)(6x+24-54)
(6x-30)(6x-30)=(6x-30)^{2}
36x^{2}-360x+900=0|:36
x^{2}-10+25=0
delta=b^{2}-4ac
delta=100-100=0
[/tex]
[tex]x_{1}=x_{2}[/tex] , deci:
[tex] x_{1}=\frac{-b+ \sqrt{delta}}{2a}=\frac{10+0}{2}=5[/tex]
[tex]x_{2}=\frac{-b-\sqrt{delta}}{2a}=\frac{10-0}{2}=5[/tex]
R: x=5
