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OpenStudy (anonymous):
x+y+z=10 a+b+z=20 What is the average of a and b if the average of x and y is 3?
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OpenStudy (anonymous):
@oldrin.bataku
OpenStudy (loser66):
i think it is 8
OpenStudy (anonymous):
@Loser66 can you tell me how you got it?
OpenStudy (dan815):
|dw:1371784846569:dw|
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