Question
A box consisted of 156 grey, brown and black marbles. There were thrice as many black marbles as brown marbles, and 24 more brown marbles than grey marbles. How many brown marbles were there in the box?
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A box consisted of 156 grey, brown and black marbles. There were thrice as many black marbles as brown marbles, and 24 more brown marbles than grey marbles. How many brown marbles were there in the box?