SOLUTION: If 5 machines complete a certain task in 12 days, how many machines are needed to finish the same task in 10 days?

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Question 628273: If 5 machines complete a certain task in 12 days, how many machines are needed to finish the same task in 10 days?
Found 2 solutions by bondc, hibiskus:
Answer by bondc(3) About Me  (Show Source):
You can put this solution on YOUR website!
5 machines = x machines
12 days 10 days
50 = 12x
x = 25/6 or 4.11111 machines
Since machines cannot be bought this way, the answer is still 5.

Answer by hibiskus(2) About Me  (Show Source):
You can put this solution on YOUR website!
If 12 then 5. If 10 then how many?
12->5
10->%2812%2F10%29%2A5=%282%2A6%29%2F%282%2A5%29%2A5=6
there are 6 machines