Найдите неизвестный член пропорции x: 20=2: 5 x: 18=2: - вопрос №92886012025182359151879 от alexvelova 30.07.2020 14:43

Question

Математика: Найдите неизвестный член пропорции x: 20=2: 5 x: 18=2: 3 5: 9=15: × x: 18=7: 9 6: x=3: 7 12: 7=60: x

alexvelova · Answer

X/20 = 2/55x = 40x = 8x/18 = 2/33x = 36x = 125/9 = 15/x5x = 135x = 27x/18 = 7/99x = 126x = 146/x = 3/73x = 42x = 1412/7 = 60/x12x = 420x = 35...