Question
PSLE
At first, a box contained 8 purple balls and some green beads. After some purple balls were added, 58 of the balls were green. After 76 black balls were added to the box and now, 512 of the beads were green. What was the number of purple balls added?
2 m

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PSLE
At first, a box contained 8 purple balls and some green beads. After some purple balls were added, 58 of the balls were green. After 76 black balls were added to the box and now, 512 of the beads were green. What was the number of purple balls added?