Question

а-13/18а=1/3 решите уравнение

Answer 1

$\frac{a-13}{18a} = \frac{1}{3}\\ 3(a-13) = 18a\\3a - 39 = 18a\\3a - 18a = 39\\-15a = 39\\a = -\frac{39}{15}\\a = -\frac{13}{5}\\a = -2\frac{3}{5}\\a = -2,6$

Ответ: -2,6