Răspuns :
5ore------------------ 60 piese 1 ora=12 piese
8 ore------------------- x
x=60x8:5=96 piese
8 ore------------------- x
x=60x8:5=96 piese
5x=480
x=96
5ore............60 ore
8ore.............x ore
fa x adica 5·x=60·8
x=96
5ore............60 ore
8ore.............x ore
fa x adica 5·x=60·8