Tolong sekalian caranya ya…​

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Tolong sekalian caranya ya...​

Tolong sekalian caranya ya…​

Jawab:

Penjelasan dengan langkah-langkah:

28. 5x+5 + 1 = 3x + 6 + 2

5x + 6 = 3x + 8

2x = 2

x = 1

x+1 = 2 (B)

29. px^2 + 6x + 36 = 0

p(6)^2 + 6*6 + 36 = 0

36p + 72 = 0

36p = -72

p = -2

p^2 + 2p = 4 – 4 = 0 (Gaada jawaban)

30. 3x + 4y = 7

     -2x +3y = -16

——————————-+

      x + 7y = -9 (C)