[tex]8x + 20 = 3x \\ 8x - 3x = - 20 \\ 5x = - 20 \\ x = - 4[/tex]
[tex](2 + \sqrt{3} )x - 2 + \sqrt{3} = 0 \\ (2 + \sqrt{3} )x = 2 - \sqrt{3} \\ x = \frac{2 - \sqrt{3} }{2 + \sqrt{3} } \\ x = {(2 - \sqrt{3} )}^{2} \\ x = 4 - 4 \sqrt{3} + 3 \\ x = 7 - 4 \sqrt{3} [/tex]
[tex] \sqrt{3} x + 4 = 1 - 1 \sqrt{3} x \\ \sqrt{3} x + 1 \sqrt{3} x = 1 - 4 \\ 2 \sqrt{3} x = - 3 \\ x = - \frac{3}{2 \sqrt{3} } \\ x = - \frac{ \sqrt{3} }{2} [/tex]
