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

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) (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(3) (Show Source): You can put this solution on YOUR website!
If 12 then 5. If 10 then how many?
12 -> 5
10 -> x
now by forming the rate we have this
12/10=5/x
and it's not direct proportion then we have
12/10=x/5 after multiplication side to side by 10 we have
12=2*x
x=6
there are 6 machines
have a nice day
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