boyancecristina
31.07.2021 •
Mathematics
A group of men decided to do a job in 8 days. But since 10 men dropped out everyday, the job got completed at the end of the 12th day. How many men were at the begining?
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Ответ:
165
Step-by-step explanation:
∵ND=N₁D₁+N₂D₂+N₃D₃−−−−−−−−N₁₂D₁₂
8x=x×1+(x−10)×1+(x−20)−−−−−(x−110)×1
8x=12x−10−20−30−−−−−−−−110
4x=10+20+30−−−−−110
4x=11/2[10+110]
4x=660
x=165
Ответ:
Step-by-step explanation:
Undefined.