Question
A grey box has 3 times as many balls as a yellow box. Peter added 5 balls to the grey box and 7 balls to the yellow box. If there are 2 times as many balls in the grey box as the yellow box, what was the total number of balls in the two boxes before Peter added the balls?
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A grey box has 3 times as many balls as a yellow box. Peter added 5 balls to the grey box and 7 balls to the yellow box. If there are 2 times as many balls in the grey box as the yellow box, what was the total number of balls in the two boxes before Peter added the balls?