SOLUTION: You have a bag of marbles.There are twice as many blue marbles as red marbles. there are 4 less green marbles than red marbles. If there are 28 marbles i the bag, how many of each

Algebra ->  Proportions  -> Lessons -> SOLUTION: You have a bag of marbles.There are twice as many blue marbles as red marbles. there are 4 less green marbles than red marbles. If there are 28 marbles i the bag, how many of each       Log On


   

Question 491122: You have a bag of marbles.There are twice as many blue marbles as red marbles. there are 4 less green marbles than red marbles. If there are 28 marbles i the bag, how many of each marble is in the bag?
thank you
Found 2 solutions by solver91311, jorel1380:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If you let represent the number of red marbles, you can use the information given to say that there are blue marbles and green marbles. Then:



Solve for , then calculate and .

The probability of drawing a green marble on a single draw is the number of green marbles divided by the total number of marbles.

John

My calculator said it, I believe it, that settles it
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Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
b=2r
g=r-4
2r+r+r-4=28
4r=32
r=8
There are 8 red marbles, 16 blue marbles, and 4 green marbles..