(6) (-18a) : 6
= (-18/6) . a
= -3a
(7) 4x : 10
Sama-sama dibagi 2
= 2x/5
(8) (20a – 12) : 4
= (20/4) a - 12/4
= 5a - 3
Baca Juga: Kunci Jawaban Bahasa Inggris Kelas 9 SMP Halaman 46 47 Greek Natural Olive Oil Terbaru 2022
6. Berbagai Penyederhanaan
Sederhanakanlah.
(1) 2(3a – 4) + 3(a + 2)
= 6a - 8 + 3a + 6
= 6a + 3a - 8 + 6
= 9a -2
(2) 6(5x + 3) + 4(-7x – 4)
= 30x + 18 - 28x -16
= 30x - 28x + 18 - 16
= 2x + 2
(3) 7(x + 2) – 4(2x – 5)
= 7x + 14 - 8x + 20
= 7x - 8x + 14 + 20
= -x + 34
(4) -2(-3a + 1) - 5(a – 8)
= 6a - 2 - 5a + 40
= 6a - 5a - 2 + 40
= a + 38