Question

Найдите значение x из пропорции а) 8/х-3 =4/3
Б) 9/4=2х-3/0,2!

Answer 1

$frac{8}{x - 3} = frac{4}{3} \ 24 = 4x - 12 \ 4x = 24 - 12 \ 4x = 12 \ x = 3$
$frac{9}{4 } = frac{2x - 3}{0.2} \ 1.8 = 8x - 12 \ 8x = 1.8 + 12 \ 8x = 13 .8 \ x = 1.725$