A drawer has some red, green, and blue marbles. There are 33 marbles in all. Thete are 4 times as many red marbles as green marbles. There are half as many blue ,marbles as green. How many blue marbles are in the drawer?

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22-12-2014
Mathematics

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A drawer has some red, green, and blue marbles. There are 33 marbles in all. Thete are 4 times as many red marbles as green marbles. There are half as many blue ,marbles as green. How many blue marbles are in the drawer?

Sagot :

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Konrad509idn Konrad509idn · Answer 1 · 2014-12-22T18:05:11-05:00

Konrad509idn Konrad509idn

22-12-2014

Let:
x - green marbles
4x - red marbles
x/2 - blue marbles

[tex]x+4x+\frac{x}{2}=33|\cdot2\\ 2x+8x+x=66\\ 11x=66\\ \boxed{x=6}\\\\ \boxed{4x=24}\\\\ \boxed{\frac{x}{2}=3} [/tex]

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