Kunci Jawaban Matematika Kelas 7 SMP MTs Kurikulum Merdeka Halaman 84 Bab 2 Menyederhanakan Bentuk Aljabar

(2) (2x – 4) + (-x + 6)
= 2x - 4 - x + 6
= 2x - x - 4 + 6
= x + 2

(3) (x – 7) – (-8x + 3)
= x - 8 + 8x - 3
= x + 8x - 7 - 3
= 9x - 10

(4) (-3a – 5) – (-9a – 7)
= -3a - 5 + 9a + 7
= -3a + 9a - 5 + 7
= 6a + 2

5. Perkalian Bentuk Aljabar dan Bilangan

Sederhanakanlah.

(1) 4a × (-2)
= 4 x (-2) x a
= -8a

(2) (-6) × (-5x)
= 30x

(3) 2(3x – 7)
= 6x - 14

(4) (x – 8) × (-3)
= -3x + 24

(5) (2x - 1)/3 x 6
= (2x - 1) x 2
= 4x - 2