SOLUTION: There are 21 tiles. twice as many blue as red, and twice as many red as green. How many of each color are there? This is 3rd grade math. I say 3 green 6 red and 12 b

Question 383792: There are 21 tiles. twice as many blue as red, and twice as many red as green. How many of each color are there? This is 3rd grade math.
I say 3 green 6 red and 12 blue.
I just kept playing with numbers till i got this. However I am not sure how you actually work these type of problems. And how do I explain it to a 9 yr old?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
x=green
2x=red
2*2x=blue
-----------
7x=21
divide by 7
x=3 green
2x=6 red
2*2x=12 blue
----------------
advanced stuff for 3rd grade
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