How many green marbles does Brian have?

label Mathematics
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Brian has a marble collection.  He has twice as many red as green.  He has 10 more blue marbles than red.  He has total of 50 marbles.

Mar 26th, 2015

Let G = number of green marbles

Let R = number of red marbles

Let B = number of blue marbles

then,

R = 2G   and  B= R+10

Also,  G+R+B = 50

Now we can substitute

G + (2G) + (R+10) = 50

3G + (2G+10) = 50

5G +10 = 50

5G = 40

G = 8

Mar 26th, 2015

Thank you.

Mar 26th, 2015

You're welcome:)


Mar 26th, 2015

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Mar 26th, 2015
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Mar 26th, 2015
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