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Question #e3e9e

1 Answer

Feb 8, 2017

If #7/8xx#something is #28.7#, then the something must be #8/7xx28.7#.

Explanation:

#8/7xx28.7=32.8#

And:
#7/8xx32.8=28.7#

This works because the two fractions are each other's inverse , so they cancel out:

#7/8xx8/7=1#

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