Найдите неизвестный член пропорции 1. 8/14=x/35
2. 7/28=x/12 3. 4/x= 6/18 4. 14/10=21/x 5. x/10=18/60 6. 45/25=18/x
/ - дробь

все

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1) x = 8 × 35/ 14= 280/14 = 20

3) x = 4 × 18/6 = 72/6 = 12

2) x = 7 × 12/ 28 = 84/28 = 3

4) x = 10 × 21 / 14 = 210/ 14 = 15

5) x = 10 × 18 /60 = 180/ 60 = 3

6) x = 25× 18 /45 = 450/45 = 10