1. 50 + (4 + 2) = 50 + 6 = 56
2. а + (5 + 3), а = 40, 40 + 8 = 48
3. 30 + (а + 6), а = 2, 30 + 8 = 38
1. 50 + (4 + 2) = 50 + 6 = 56
2. а + (5 + 3), а = 40, 40 + 8 = 48
3. 30 + (а + 6), а = 2, 30 + 8 = 38