Posted by **chuck** on Thursday, October 28, 2010 at 8:05pm.

I have 28 marbles in all. Red,Blue, Green. 8 of them are blue. I have 3 times as many red marbles than green marbles. How many are red ?

- math -
**jai**, Thursday, October 28, 2010 at 9:59pm
if 8 marbles are blue then

28 - 8 = 20 are green and red marbles

then if we let x = the number of green marbles,

then the number of red marbles is 3 times the number of green marbles, or 3*x,, and their total sum must be 20:

x + 3*x = 20

combining similar terms,

4x = 20

now solve for x. then get the number of red marbles by multiplying it by 3.

## Answer This Question

## Related Questions

- math - sally has a bag with red,blue, and green marbles. She has twice as many ...
- Math - A bowl has red,green and blue marbles.There are 95 red marbles.the nuber ...
- Math - A bag of marbles contains only green and red marbles. All of the marbles ...
- math-algebra - 7. A bag contains 5 red marbles, 6 green marbles, and 9 blue ...
- math-algebra - 7. A bag contains 5 red marbles, 6 green marbles, and 9 blue ...
- Math - You have 33 marbles in total. you have 4 times as many red marbles as ...
- algebra2/ Trigonometry - A bag contains 24 green marbles, 22 blue marbles, 14 ...
- Math ~ Check Answers ~ - 1. There are 35 marbles in a bag: 9 blue marbles, 8 ...
- Math - A bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown...
- Math-Geometry - In a jar there are 18 marbles. There are 3 red marbles, 9 green ...

More Related Questions