Question

5x supra 2y = 1,25 aflati y supra x

gasiti a, b apartine lu N stiind ca asupra b = un intreg si 1 supra 2 si a x b= 24
va rogg multt

Answer 1

$1. \frac{5x}{2y} =1.25= \frac{125}{100} \\ 500x=250y \\ \frac{x}{y} = \frac{500}{250} =2 \\ \\ 2.\frac{a}{b} =1 \frac{1}{2} = \frac{3}{2} \\ a= \frac{3b}{2} \\ a*b=24 \\ a= \frac{24}{b} \\ \frac{3b}{2} = \frac{24}{b} \\ 3b^2=48 \\b^2=16\\b=4\\a=6$

Answer 2

A. 5x:2y=1,25 => 5x: 2y= 125 :100 => 5x ori 100 = 2y ori 125 => 500x= 250y => 
y : x= 500:200 => y:x= 2

B. a:b= 3:2 => 2a=3b => 3b-2=a
a x b=24 => (3b-2)xb=24 si de aici calculezi sau daca nu merge te mai joci cu factori sa opti o ecuatie :)