(Algebra) In a metal alloy composed entirely of zinc and copper, 3 of every 14 pounds in zinc.

Question

In a metal alloy composed entirely of zinc and copper, 3 of every 14 pounds in zinc. If the alloy weighs 420 lbs, how many pounds of zinc and how many pounds of copper does it have? The amount of zinc is?

Answer 1

This  means that 3/14 of the alloy is zinc.

and 11/14 is copper.

If we have 420 lbs, and 3/14 is zinc, then

3/14 ( 420 ) = 90

90 lbs is zinc.

330 lbs is copper