Пошаговое объяснение:
1) (x - 4/15) - 3/10 = 7/20
х- 4/15= 7/20+3/10
х- 4/15= 13/20
х= 13/20 +4/15
х= 39/60 + 16/60
х= 55/60
х= 11/12
2) (x + 4/7/8) - 5 1/2 = 9 3/4
х + 4 7/8 = 39/4 + 11/2
х + 4 7/8= 61/4
х= 61/4 - 39/8
х= 83/8
х= 10 3/8
3) 7 11/12 + (6 3/10 - x) = 9 1/20
(6 3/10 - x) = 181/20 - 95/12
6 3/10 - х= 543/60 - 475/60
(6 3/10 - x)= 68/60
х=63/10 - 68/60
х= 378/60 - 68/60
х=310/60
х= 5 1/6
(х - 4/15) - 3/10 = 7/20
х - 4/15 = 7/20 + 3/10
х - 4/15 = 7/20 + 6/20
х - 4/15 = 13/20
х = 13/20 + 4/15
х = 39/60 + 16/60
х = 55/60
х = 11/12
(х + 4. 7/8) - 5. 1/2 = 9. 3/4
х + 4. 7/8 = 9. 3/4 + 5. 1/2
х + 4. 7/8 = 9. 6/8 + 5. 4/8
х + 4. 7/8 = 14. 10/8
х = 14. 10/8 - 4. 7/8
х = 10. 3/8
7. 11/12 + (6. 3/10 - х) = 9. 1/20
6. 3/10 - х = 9. 1/20 - 7. 11/12
6. 3/10 - х = 9. 3/60 - 7. 55/60
6. 18/60 - х = 8. 63/60 - 7. 55/60
6. 18/60 - х = 1. 8/60
х = 6. 18/60 - 1. 8/60
х = 5. 10/60
х = 5. 1/6
Пошаговое объяснение:
1) (x - 4/15) - 3/10 = 7/20
х- 4/15= 7/20+3/10
х- 4/15= 13/20
х= 13/20 +4/15
х= 39/60 + 16/60
х= 55/60
х= 11/12
2) (x + 4/7/8) - 5 1/2 = 9 3/4
х + 4 7/8 = 39/4 + 11/2
х + 4 7/8= 61/4
х= 61/4 - 39/8
х= 83/8
х= 10 3/8
3) 7 11/12 + (6 3/10 - x) = 9 1/20
(6 3/10 - x) = 181/20 - 95/12
6 3/10 - х= 543/60 - 475/60
(6 3/10 - x)= 68/60
х=63/10 - 68/60
х= 378/60 - 68/60
х=310/60
х= 5 1/6
Пошаговое объяснение:
(х - 4/15) - 3/10 = 7/20
х - 4/15 = 7/20 + 3/10
х - 4/15 = 7/20 + 6/20
х - 4/15 = 13/20
х = 13/20 + 4/15
х = 39/60 + 16/60
х = 55/60
х = 11/12
(х + 4. 7/8) - 5. 1/2 = 9. 3/4
х + 4. 7/8 = 9. 3/4 + 5. 1/2
х + 4. 7/8 = 9. 6/8 + 5. 4/8
х + 4. 7/8 = 14. 10/8
х = 14. 10/8 - 4. 7/8
х = 10. 3/8
7. 11/12 + (6. 3/10 - х) = 9. 1/20
6. 3/10 - х = 9. 1/20 - 7. 11/12
6. 3/10 - х = 9. 3/60 - 7. 55/60
6. 18/60 - х = 8. 63/60 - 7. 55/60
6. 18/60 - х = 1. 8/60
х = 6. 18/60 - 1. 8/60
х = 5. 10/60
х = 5. 1/6