Question

дам 25 балов за эти уравнения​

Answer 1

Ответ:

а)

$2,5:1,6=x:1,92\\\\\frac{2,5}{1,6} =\frac{x}{1,92}\\\\2,5*1,92=x*1,6\\\\4,8=1,6x\\x =4,8:1,6\\\\x = 3$

б)

$\frac{3\frac{1}{5} }{x} =\frac{4}{\frac{2}{5} } \\\\x*4=3\frac{1}{5}*\frac{2}{5} \\\\4x=\frac{16}{5}*\frac{2}{5}\\\\4x=\frac{32}{25} \\\\\\4x=1,28\\\\x=1,28:4\\\\x=0,32$