tolong yh kak yg nomor 2 a sama c..soalnya besok dikumpulin

Jawab :
a. (6x + 5) + (x - 2)
= 6x + x + 5 - 2
= 7x + 3

c. 2x - 5 - x + 3
= 2x - x - 5 + 3
= x - 2