Question 1188867
Number of red marbles (at start) = n
Number of blue marbles (at start) = n
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Number of marbles remaining after giveaways and sales:
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4/9(n) + (n - 49) = 1/3(2n)
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4/9(n) + (n - 49) = 2/3(n)
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(n - 49) = 2/3(n) - 4/9(n)
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-49 = 2/3(n) - 4/9(n) - n
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-49 = 6/9(n) - 4/9(n) - 9/9(n)
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-49 = -7/9(n)
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-49(-9/7) = n
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n = 63
<pr>
Number of red marbles (at start) = n = 63
Number of blue marbles (at start) = n = 63
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<b>Mark had a total of 126 marbles at the start.</b>