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Marcia bought a bag of marbles. there were twice as many purples ones as red ones there were 93 marbles in all. how many of each color marble were there?
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Marcia bought a bag of marbles. there were twice as many purples ones as red ones there were 93 marbles in all. how many of each color marble were there?
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Mar 20, 2017
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Marcia bought a bag of marbles. there were twice as many purples ones as red ones there were 93 marbles in all. how many of each color marble were there?
Mathematics
high-school
Techayu
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Techayu
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r=number of red m arbles
p=number of purple marbles
2 times as many purple as red
p=2r
total is 93
r+p=93
we have
p=2r
r+p=93
subsitute 2r for p
r+2r=93
3r=93
divide 3
r=31
subsitute
p=2r
p=2(31)
p=62
31 red
63 purble
Detuned
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Mar 25, 2017
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Detuned
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