in a box, the number of gold coins was 20% of the number of silver coins. Faizal added 60 more gold coins and 60 more silver coins into the box. As a result, there were 4/5 as many gold coins as silver coins in the box. Find the total number of coins Faizal has in the end.
so, what do we know?
g = 1/5 s
g+60 = 4/5 (s+60)
solve as usual, and then you want g+60 + s+60