Question

решите уравнение 9х=1, 1/2х=1, 3 2/5=1, 2/13х=1

Answer 1

$9x = 1 \ x = frac{1}{9} \ \ frac{1}{2} x = 1 \ x = 1 div frac{1}{2} = 1 times frac{2}{1} \ x = 2 \ \ 3 frac{2}{5} x = 1 \x = 1 div 3 frac{2}{5} = 1 div frac{17}{5} = 1 times frac{5}{17} \ x = frac{5}{17} \ \ frac{2}{13} x = 1 \ x = 1 div frac{2}{13} \ x = 1 times frac{13}{2} \ x = frac{13}{2} = 6 frac{1}{2}$