There were two different copper alloys of total weight 50 kg. The first contains 40% less copper than the second. Determine the percentage of copper in the first and second alloys, if it is known that there were 6kg of copper in the first alloy and 12 kg in the second.
This appears to be a system of two unknowns. I have trouble setting up the correct equation from the given information in word problems.
There are two different copper alloys. I will let x and y represent the two alloys.
Can someone set up the two system of equations for me?