Question
Mr Chen is 42 kg heavier than his son, Jeremy and 21 kg heavier then his daughter, Gabby. Given that their total mass is 240 kg, how much does Mr Chen weigh?
4 m

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Mr Chen is 42 kg heavier than his son, Jeremy and 21 kg heavier then his daughter, Gabby. Given that their total mass is 240 kg, how much does Mr Chen weigh?