SOLUTION: alice can wash he car in 3 and 1/2 hours if bernice helped her she can do the job in 2 hours. how long would it take if bernice working alone?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: alice can wash he car in 3 and 1/2 hours if bernice helped her she can do the job in 2 hours. how long would it take if bernice working alone?       Log On


   

Question 919599: alice can wash he car in 3 and 1/2 hours if bernice helped her she can do the job in 2 hours. how long would it take if bernice working alone?









Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
1%2F%287%2F2%29+%2B+1%2Fx+=+1%2F2+
2%2F7+%2B+1%2Fx+=+1%2F2 |Multiplying thru by 14x so as all denominators = 1
2x + 14 = 7x
14 = 5x
14/5 = x = 2.8 hr