Question

Решите уравнение:
$frac{1}{18}:( frac{1}{13})^{2} - frac{1}{9}$

Answer 1

$frac{1}{18} *169- frac{1}{9} = frac{169}{18} - frac{1}{9} = frac{169-2}{18} = frac{167}{18} =9 frac{5}{18}$