[tex] \sqrt{2x - 1} + \sqrt{2 - 1} = 4[/tex]
[tex] \sqrt{2x - 1} + \sqrt{1} = 4[/tex]
[tex] \sqrt{2x - 1 } + 1 = 4[/tex]
[tex] \sqrt{2x - 1} = 4 - 1[/tex]
[tex] \sqrt{2x - 1} = 3 [/tex]
[tex]2x - 1 = 9[/tex]
[tex]2x = 9 + 1[/tex]
[tex]2x = 10[/tex]
[tex]x = 5[/tex]