SOLUTION: A company that mixes and sells concrete to deliever several loads of concrete contaning an aggregate that is 20% sand by weight. The company has a pile that contains 360,000 lb of

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A company that mixes and sells concrete to deliever several loads of concrete contaning an aggregate that is 20% sand by weight. The company has a pile that contains 360,000 lb of       Log On


   

Question 604914: A company that mixes and sells concrete to deliever several loads of concrete contaning an aggregate that is 20% sand by weight. The company has a pile that contains 360,000 lb of aggregate that is 15% sand. How much sand will be required to mix with the aggregate in the pile to produce a mixture that is 20% sand?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(15%)(360,000) + x = (20%)(360,000 + x)