Найдите неизвестный член пропорции 1)х/14=9/18 2)х/2=15/5 3)12/х=20/5 4)2/10=х/25 5)21/3=35/х 6)18/3=х/4
1) Х = (14 * 9 ) \ 18 = 14\2 = 7 2) Х = ( 15 * 2 ) \ 5 = 6 3) Х = ( 12 * 5 ) \ 20 = 12\4 = 3 4) Х = ( 2 * 25 ) \ 10 = 5 5) Х = ( ( 35 * 3 ) \ 21 = 35\7 = 5 6) Х = ( 18 * 4 ) \ 3 = 24
1) 18х = 9 * 14 х = 9 * 14 / 18 х = 126 / 18 х = 7 2) 5х = 2*15 5х = 30 х = 30:5 х = 6 3) 20х = 12*5 20х = 60 х = 60 :20 х = 3 4) 10х = 2*25 10х = 50 х = 50:10 х = 5 5) 21х = 35* 3 21х = 105 х = 105 :21 х = 5 6) 3х = 18*4 3х = 72 х = 72:3 х=24