<h5>If 12a+3b=1 and 7b-2a=9, what is the average of a and b?</h5>

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If 12a+3b=1 and 7b-2a=9, what is the average of a and b?

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If 12a+3b=1 and 7b-2a=9, what is the average of a and b?