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264hl-?hl=20 kl dau corana

Răspuns :

264 hl- x hl=20kl          
20kl=20*10hl=200hl
x=264hl-200hl
x=64 hl
20 kl = 200 hl
264 hl - ? hl = 200 hl
? hl = 264 hl - 200 hl
? hl = 64 hl
? = 64 / 64 hl = 6,4 kl