поионите я опаздываю в школу​

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

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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