1)8 целых 7/10 (7 целых 4/5 -а) при а = 6 целых 1/2
2)14 целых 1/6 - (8 Целых 9/1-б) при б =5 целых 2/3
3) а-(9 целых 3/50 - 5 целых 7/25) при а = 7 целых 1/2
4) (20 целых 1/5 - б)- 6целых 1/3 при б = 11 2/15
Помогите пожалуйста
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