SOLUTION: Two printing presses can complete a job in 2 hours. if one requires 6 hours to do the job alone, how many hours would the second press need to conplete the job alone?

SOLUTION: Two printing presses can complete a job in 2 hours. if one requires 6 hours to do the job alone, how many hours would the second press need to conplete the job alone?

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Question 83273This question is from textbook introductory algebra
: Two printing presses can complete a job in 2 hours. if one requires 6 hours to do the job alone, how many hours would the second press need to conplete the job alone? This question is from textbook introductory algebra

Answer by checkley75(3666) (Show Source): You can put this solution on YOUR website!
2=6x/(6+x) now cross multiply
2(6+x)=6x
12+2x=6x
6x-2x=12
4x=12
x=12/4
x=3 hours for the other machine working alone.
proof
6*3/(6+3)=2
18/9=2
2=2
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