SOLUTION: an ore contains 20% zinc. how many kg of ore will be required to get 45 kg of zinc

Algebra ->  Absolute-value -> SOLUTION: an ore contains 20% zinc. how many kg of ore will be required to get 45 kg of zinc      Log On


   

Question 924050: an ore contains 20% zinc. how many kg of ore will be required to get 45 kg of zinc
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
ore contains 20% zinc.
need 45 kg of zinc.

x = amount of ore

equation is .2 * x = 45
divide both sides of this equation by .2 to get:
x = 45 / .2
solve for x to get x = 225

he needs 225 kg of ore to get 45 kg of zinc.
.2 * 225 = 45