SOLUTION: If one guy paints a house in 12 hrs and another paints it in 6hrs .how long would it take them to paint it together

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Question 697293: If one guy paints a house in 12 hrs and another paints it in 6hrs .how long would it take them to paint it together
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
1/12+1/6=1/X
1/12+2/12=1/X
3/12=1/X CROSS MULTIPLY.
3X=12
X=12/3
X=4 HOURS WORKING TOGETHER.