Sederhanakanlah.
(1) (3a + 1) + (5a – 8)
Jawaban
= 3a + 1 + 5a – 8
= 3a + 5a + 1 – 8
= 8a – 7
(2) (2x – 4) + (-x + 6)
Jawaban
= 2x – 4 – x + 6
= 2x – x – 4 + 6
= x + 2
(3) (x – 7) – (-8x + 3)
Jawaban
= x – 8 + 8x – 3
= x + 8x – 7 – 3
= 9x – 10
(4) (-3a – 5) – (-9a – 7)
Jawaban
= -3a – 5 + 9a + 7
= -3a + 9a – 5 + 7
= 6a + 2
