In a rare coin collection, all coins are either pure gold or pure silver, and there is initially one gold coin for every three silver coins. With the addition of 10 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information, how many total coins are there now in this collection (after the acquisition)?
Select the correct option
A) 40 B) 50 C) 60 D) 80 E) 90
Let's call g = # of gold coins and s = # of silver coins   Initially 3g = s and after the acquisition 2(g+10) = s   Let's solve the simultaneous equations by subtracting the second expression form the first expression: 3g-2g+20 = 0, yields g = 20.   After the acquisition we have 30 gold coins and double that in silver coins (60). A total of 90 coins.   ANSW90R:90
<result>E</result>
In a rare coin collection, all coins are either pure gold or pure silver, and there is initially one gold coin for every three silver coins. With the addition of 10 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information, how many total coins are there now in this collection (after the acquisition)?