Question

3/7+|4x|=1 (Решите уравнение)

Answer 1

$\frac{3}{7} + | 4x| = 1 \\ \frac{3}{7} + 4 \times |x| = 1 \\ 4 \times |x| = 1 - \frac{3}{7} \\ 4 \times |x| = \frac{4}{7} \\ |x| = \frac{1}{7} \\ x = \frac{1}{7} \\ x = - \frac{1}{7}$