7/28 = х/12 14/10=21/х

Question

7/28 = х/12 14/10=21/х

Answer 1

7/28 = х/12
х= 7*12: 28
х= 3
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14/10 = 21/х
х=10*21:14
х= 15

Comments

45/25=18/х

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х= 25*18 : 45, х= 10

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;-)

Answer 2

7/28=х/12
28х=84
х=84:28
х=3

14/10=21/х
14х=210
х=210:14
х=15