Question

Найди корни уравнения 1:3x+1:19x−1:57x=21

Answer 1

$\frac{1 \times 19}{19 \times 3x} + \frac{1 \times 3}{3 \times 19x} - \frac{1}{57x} = 21$
$\frac{21}{57x} = 21 \\ x = \frac{21}{21 \times 57} \\ x = \frac{1}{57}$