Question
PSLE
Jack had 9 jars of beads. At first, each of the jars contained the same number of beads. He took 20 beads from each jar. After that, the total number of beads left in the 9 jars was equal to the total number of beads in 3 of the jars at first. What was the number of beads in each jar in the end?
3 m

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PSLE
Jack had 9 jars of beads. At first, each of the jars contained the same number of beads. He took 20 beads from each jar. After that, the total number of beads left in the 9 jars was equal to the total number of beads in 3 of the jars at first. What was the number of beads in each jar in the end?