
Max W. answered 11/26/19
Tutor
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4th Year Medical Student, USMLE, Chess, and Medical Writing Tutor
The way to answer this questions is as follows:
If 1/6X=42, then multiple both sides by 6 so X=252
Then you want 2/7X, so multiple both sides by 2 and then divide both sides by 7, so you get 2/7X=72.