Răspuns :
18 (muncitori) ------ 15 h
(18 muncitori +n muncitori) ----- 9h
[tex] \frac{18}{18+n} = \frac{9}{15} [/tex] => [tex] \frac{18}{18+n} = 0,6[/tex] => [tex]18+n=30[/tex] => [tex]n=12[/tex]. Invers proportionalitate s-a aplicat aici.
(18 muncitori +n muncitori) ----- 9h
[tex] \frac{18}{18+n} = \frac{9}{15} [/tex] => [tex] \frac{18}{18+n} = 0,6[/tex] => [tex]18+n=30[/tex] => [tex]n=12[/tex]. Invers proportionalitate s-a aplicat aici.
18 mucitori............15ore
18+x....................9ore
18/18+x=9/15
18/18+x=0,6
18+x=30
x=12
18+x....................9ore
18/18+x=9/15
18/18+x=0,6
18+x=30
x=12