1. 3b +(5a - 7b) = 3b + 5a - 7b = -4b + 5a
2. -(11a + b) - (12a - 3b) = -11a - b - 12a + 3b = -23a + 2b
3. 3(8a - 4) + 6a = 24a - 12 + 6a = 30a - 12
4. -4(3a + 2) + 8 = -12a - 8 + 8 = -12a
1. 3b +(5a - 7b) = 3b + 5a - 7b = -4b + 5a
2. -(11a + b) - (12a - 3b) = -11a - b - 12a + 3b = -23a + 2b
3. 3(8a - 4) + 6a = 24a - 12 + 6a = 30a - 12
4. -4(3a + 2) + 8 = -12a - 8 + 8 = -12a