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OpenStudy (anonymous):
Sarah, Amy and Liam stand on some weighing scales two at a time. Here are the measurements: Sarah and Amy Sarah and Liam Liam and Amy 70kg 80kg 80kg How much does Liam weigh? show working please :)
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OpenStudy (anonymous):
helpppppppp
OpenStudy (anonymous):
:(
OpenStudy (anonymous):
I don't know! sorry :( I love your new pic though :D
OpenStudy (anonymous):
lol thnaks re-re
OpenStudy (anonymous):
next time yhh :)
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OpenStudy (mathmagician):
S+A=70 S+L=80 L+A=80 You see, that S+L=L+A => S=A S+A=70=>A=70/2=35 and finally L=80-35=45
OpenStudy (anonymous):
THNX MATH MAGICIAN UR A LIFE SAVER
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