Question
Oscar bought equal number of boxes of white marbles and packets of pink marbles. 5 boxes and 4 packets contain 31 marbles. 4 boxes and 5 packets contain 32 marbles. There were 77 marbles altogether. How many boxes of white marbles did Oscar buy?
4 m

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Oscar bought equal number of boxes of white marbles and packets of pink marbles. 5 boxes and 4 packets contain 31 marbles. 4 boxes and 5 packets contain 32 marbles. There were 77 marbles altogether. How many boxes of white marbles did Oscar buy?