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OpenStudy (anonymous):
Alan is twice as old as Sue and half as old as Joseph. If the average (arithmetic mean) of all three ages is 14, how old is Sue? 1. 6 2. 7 3. 14 4. 16 5. 21
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OpenStudy (anonymous):
2x=y x=2z 4z=y x+2x+1/2x=14(3) 3x+1/2x=42 7/2x=42 7x=84 x=12 y=6 z=24
OpenStudy (anonymous):
sue is 6
OpenStudy (anonymous):
thx
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