Question

Найдите х из пропорций​

Answer 1

Ответ:

$x= -\frac{125}{12} = -10\frac{5}{12}$

Пошаговое объяснение:

$\frac{1\frac{2}{3} }{2-2,4} = \frac{x}{2,5}\\\\ x = \frac{(1\frac{2}{3})}{2-2,4}\cdot 2,5\\\\x = \frac{(1\frac{2}{3})}{-0,4}\cdot 2,5\\\\x = -(1\frac{2}{3}):(0,4)\cdot(2,5)\\\\x = -(1\frac{2}{3}) : (\frac{2}{5})\cdot (\frac{5}{2})\\\\x =-(\frac{5}{3})\cdot(\frac{5}{2} )\cdot(\frac{5}{2} )\\\\x = -\frac{5\cdot5\cdot5}{3\cdot2\cdot2} \\\\x = -\frac{125}{12} = -10\frac{5}{12}$