sederhanakanlah operasi berikut! a.6x-8x-5y+6y b.(4x+8y)-4(x-y) c.4(3p-q)+7(2p-5q)

a. 6x - 8x - 5y + 6y
= (6x - 8x) - (5y - 6y)
= -2x - (-y)
= -2x + y   ⇔ = y - 2x

b. (4x + 8y) - 4 (x - y)
= 4x + 8y - 4x + 4y
= (4x - 4x) + (8y + 4y)
= 0 + 12y
= 12y

c. 4 (3p - q) + 7 (2p - 5q)
= 12p - 4q + 14p - 35q
= (12p + 14p) - (4q + 35q)
= 26p - 39q