Mohon gunakan cara nya

a). (2x + 3) + (x – 1)

8= 2x + 3 + x – 1

= 2x + x + 3 – 1

= 3x + 2

b). (a – 2b) + (3a + b)

= a – 2b + 3a + b

= a + 3a – 2b + b

= 4a – b

c). (m² – 2m + 5) + (m² – m – 3)

= m² – 2m + 5 + m² – m – 3

= m² + m² – 2m – m + 5 – 3

= 2m² – 3m + 2

d). (p – q + 7) + (2p + 6q + 4)

= p – q + 7 + 2p + 6q + 4

= p + 2p – q + 6q + 7 + 4

= 3p + 5q + 11