Răspuns:
[tex] \frac{x + 1}{4x + 7} = \sqrt{0.04} \\ \frac{x + 1}{4x + 7} = \sqrt{ \frac{4}{100} } \\ \frac{x + 1}{4x + 7} = \frac{ \sqrt{4} }{ \sqrt{100} } \\ \frac{x + 1}{4x + 7} = \frac{2}{10} \\ 10(x + 1) = 2(4x + 7) \\ 10x + 10 = 8x + 14 \\ 10x - 8x = 14 - 10 \\ 2x = 4 \\ x = 2 \\ cum \: x \: diferit \: de \: \frac{7}{8} rezulta \: ca \: x = 2 \: este \: solutie \: a \: ecuatiei[/tex]