Question
Penelope had a total of 326 black and red marbles. She used 45 of her black marbles and bought another 31 red marbles. The number of red marbles she had then become 14 the number of black marbles. How many less red marbles than black marbles did she have at first?
4 m

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Penelope had a total of 326 black and red marbles. She used 45 of her black marbles and bought another 31 red marbles. The number of red marbles she had then become 14 the number of black marbles. How many less red marbles than black marbles did she have at first?