Question
PSLE
Seth has a ribbon which is 79 cm long. He cuts it into three pieces. The first piece is (m + 7) cm, the second one is m cm and the third one is 2m cm.  Find the value of m. Give your answer in cm.
2 m

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PSLE
Seth has a ribbon which is 79 cm long. He cuts it into three pieces. The first piece is (m + 7) cm, the second one is m cm and the third one is 2m cm.  Find the value of m. Give your answer in cm.