Question

2/*=14/21 и 5/* =15/21

Answer 1

*=2*21/14= 21/7= 3

2/3= 14/21

*=5*21/15= 21/3= 7

5/7= 15/21

Answer 2

2/*=14/21

2/3=14/21 2 и 3 умножаем на 7

5/*=15/21

5/7=15/21 5 и 7 умножаем на 3