Question
Riordan is four times as heavy as Ahmad and Archie weighs 30 kg more than Riordan. Given that the 3 of them weigh 255 kg, what is Archie's mass?
4 m

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Riordan is four times as heavy as Ahmad and Archie weighs 30 kg more than Riordan. Given that the 3 of them weigh 255 kg, what is Archie's mass?