3. b = 12/17
4. m = 11/43
Пошаговое объяснение:
3. 15/17 - (b - 3/17) = 6/17
15/17 - b + 3/17 = 6/17
b = 15/17 + 3/17 - 6/17
b = 18/17 - 6/17
b = 12/17
---
15/17 - (12/17 - 3/17) = 6/17
15/17 - 9/17 = 6/17
6/17 = 6/17
4. 29/43 - (m + 13/43) = 5/43
29/43 - m - 13/43 = 5/43
m = 29/43 - 5/43 - 13/43
m = 29/43 - 18/43
m = 11/43
29/43 - (11/43 + 13/43) = 5/43
29/43 - 24/43 = 5/43
5/43 = 5/43
