Question

Jawab beserta caranya!​

Answer 1

Jawaban:

15. 3x² + 5x - 4x + 2x² + 6

= 3x² + 2x² + 5x - 4x + 6

= 5x² + x + 6

16. 2x + 8 = 20

2x = 20 - 8

x = 12/2

x = 6

17. b. setiap bilangan genap pasti habis dibagi dua

18. 27 - 4k = -9

-4k = -9 - 27

k = -36/-4

k = 9

19. 3p - 4 = p + 8

3p - p = 8 + 4

2p = 12

p = 12/2

p = 6

20. 4x + 7 = 6x - 5

4x - 6x = -5 - 7

-2x = -12

x = -12/-2

x = 6

jadi nilai x - 2 = 6 - 2 = 4

Answer 2

Verified answer

Jawaban:

15) = 3x² + 5x - 4x + 2x² + 6

= 3x² + 2x² + 5x - 4x + 6

= 5x² + x + 6 ( option C)

16) 2x + 8 = 20

2x = 20 - 8

2x = 12

x = 12 : 2

x = 6 ( option C)

17) Secara umum setiap bilangan genap habis dibagi oleh 2 sehingga bilangan genap dapat didefinisikan sebagai bilangan yang habis dibagi 2. ( option B)

18) 27 - 4k = -9

27 + 9 = 4k

36 = 4k

k = 36 : 4

k = 9 ( option D)

19) 3p - 4 = p + 8

3p -p = 8 + 4

2p = 12

p = 12 : 2

p = 6 ( option C)

20) 4x + 7 = 6x - 5

4x - 6x = -5 - 7

- 2x = -12

x = -12/-2

x = 6

maka

x - 2 = 6 - 2 = 4 ( option A)