As shown above, I need to guess what goes through the ?-part. I tried number patterns, division, and all but I can't seem to solve it.
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1Welcome to MSE. For some basic information about writing mathematics at this site see, e.g., basic help on mathjax notation, mathjax tutorial and quick reference, main meta site math tutorial and equation editing how-to. – José Carlos Santos Jun 30 '23 at 10:17
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If you multiply left and right, and separately add top and bottom, you should see what's happening.
Gerry Myerson
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