Lizwi Posted July 26, 2019 Share Posted July 26, 2019 Link to comment Share on other sites More sharing options...
mathematic Posted July 26, 2019 Share Posted July 26, 2019 Why 7x-2x? The congruence question is 7x and 8x, Link to comment Share on other sites More sharing options...
Lizwi Posted July 27, 2019 Author Share Posted July 27, 2019 (edited) Check Edited July 27, 2019 by Lizwi Link to comment Share on other sites More sharing options...
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