Amount 64464

There are 12,000 tons of coal on the first dome and 2,200 tons on the second. They take 80 tons from the first kick every day and 60 tons from the second. How many days will the same amount of coal be on both kicks?

Correct answer:

d =  70

Step-by-step explanation:

1200080 d=2200+60 d  140d=9800  d=1409800=70  d=70

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