Question

Решите уравнение: а) 8 4/5 : 2 1/2 = 4 2/5 : x; b) x : 0,6 = 1,3 : 3,9

Answer 1

a)
$8 times frac{2}{5} times frac{1}{2} = 4 times frac{2}{5} times frac{1}{x} \ 4 times frac{2}{5} = frac{8}{5x} \ frac{8}{5} = frac{8}{5x} \ 40x = 40 \ x = 1$
b)
$x times 3.9 = 1.3 times 0.6 \ 3.9x = 0.78 \ x = 0.2$