Minta tolong bantuan nya No 3 dan no 5 kerjakan yah soal nya saya gk ngerti terimah kasih

3. 4 (3a + 5b) -2 (5a - 6b)
= 12a + 20b - 10a + 12b
= 12a - 10a + 20b + 12b
= 2a + 32b
3. 3 (6d - 2c) -4 (7d + c)
= 18d - 6c - 28d - 4c
= 18d - 28d - 6c - 4c
= -10d - 10c (C)
5. 4 (x + y) -2 (x + 3y)
= 4x + 4y - 2x - 6y
= 4x - 2x + 4y - 6y
= 2x - 2y
semoga membantu