какое задание?????????????????
24 / 32 = 0,9 / х,
х = (32 * 0,9) / 24,
х = 1,2 ⇒ 24 / 32 = 0,9 / 1,2
15 : х = 6,3 : 4,2,
х = (15 * 4,2) / 6,3,
х = 10 ⇒ <span>15 : 10 = 6,3 : 4,2
3,6 : 8,1 = х : 18,
х = (3,6 * 18) / 8,1,
х = 8 </span>⇒ <span>3,6 : 8,1 = 8 : 18
3/7 : 1 1/4 = 0,4 : х,
х = (1 1/4 * 0,4) / (3/4),
х = 5/4 * 4/10 * 4/3,
х = 2/3 </span>⇒ <span>3/7 : 1 1/4 = 0,4 : 2/3</span>
8*2/3:(5/6x-5/3)-19/40=21/40
8*2/3:5x-10/6-19/40=21/40
8*2/3:5x-10/6-19/40=21/40
8*2/3*6/5x-10-19/40=21/40
8*2*2/5x-10-19/40=21/40
32/5x-10=19/40=21/40
32/5x-10=21/40+19/40
32/5x-10=21+19/40
21/5x-10=40/40
32/5x-10=1
32=5x-10
-5x=-10-32
-5x=-42
x=42/5
x=8 2/5
Ответ: 8 2/5