Пошаговое объяснение:
А)
3. 2/5 : х = 6. 4/5 : 1. 1/3
х * 6. 4/5 = 3. 2/5 * 1. 1/3
6. 4/5х = 17/5 * 4/3
34/5х = 68/15
х = 68/15 : 34/5
х = 68/15 * 5/34
х = 2/3 * 1/1
х = 2/3
Б)
7. 1/3 : 2. 1/2 = 3. 2/3 : у
7. 1/3 * у = 2. 1/2 * 3. 2/3
7. 1/3у = 5/2 * 11/3
22/3у = 55/6
у = 55/6 : 22/3
у = 55/6 * 3/22
у = 5/2 * 1/2
у = 5/4
у = 1. 1/4
В)
4. 2/5 : х = 8. 4/5 : 2. 1/2
х * 8. 4/5 = 4. 2/5 * 2. 1/2
8. 4/5х = 22/5 * 5/2
44/5х = 22/2
44/5х = 11
х = 11 : 44/5
х = 11 * 5/44
х = 1 * 5/4
х = 5/4
х = 1. 1/4
Г)
6. 1/2 : 3. 3/4 = 3. 1/4 : у
6. 1/2 * у = 3. 3/4 * 3. 1/4
6. 1/2у = 15/4 * 13/4
13/2у = 195/16
у = 195/16 : 13/2
у = 195/16 * 2/13
у = 15/8 * 1/1
у = 15/8
у = 1. 7/8
Пошаговое объяснение:
880 . a) 3 2/5 : x = 6 4/5 : 1 1/3 ; в ) 4 2/5 : x = 8 4/5 : 2 1/2 ;
x = ( 3 2/5 * 1 1/3 )/6 4/5 ; x = ( 4 2/5 * 2 1/2 )/8 4/5 ;
x = 28/15 : 34/5 ; x = 11 : 44/5 ;
x = 14/51 ; x = 11 * 5/44 = 5/4 = 1 1/4 ;
б) 7 1/3 : 2 1/2 = 3 2/3 : y ; г) 6 1/2 : 3 3/4 = 3 1/4 : y ;
y = ( 2 1/2 * 3 2/3 )/7 1/3 ; y = ( 3 3/4 * 3 1/4 )/6 1/2 ;
y = 55/6 : 22/3 ; y = ( 15/4 * 13/4 ) : 13/2 ;
y = 5/4 = 1 1/4 ; y = (15 *13/16 ) * 2/13 ;
y = 1`5/8 =1 7/8 .