Задача 13. Найдите корень уравнения: \(\frac{1}{{10x + 3}} = \frac{1}{2}.\)
Решение
\(\frac{1}{{10x + 3}} = \frac{1}{2}\,\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,\left\{ {\begin{array}{*{20}{c}}{10x + 3 \ne 0}\\{10x + 3 = 2}\end{array}\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,\left\{ {\begin{array}{*{20}{c}}{x \ne — 0,3}\\{x = — 0,1\,}\end{array}} \right.} \right.\,\,\,\,\,\,\,\, \Leftrightarrow \,\,\,\,\,\,x = — 0,1.\)
Ответ: – 0,1.