Tolong di bantu cara pengerjaan nya

a). 5x – 3y – 2x – y

= 5x – 2x – 3y – y

= 3x – 4y

b). 4a – 7 – 3a + 2 – 2a

= 4a – 3a – 2a – 7 + 2

= -a – 5

c). p – 3pq + 4q – 3p + 2pq + q

= p – 3p – 3pq + 2pq + 4q + q

= –2p – pq + 5q

d). -m² + 2m – 8 – 4m² + 5 – 2m

= -m² – 4m² + 2m – 2m – 8 + 5

= -5m² – 3