selesaikan persamaan berikut ! a.5×-3 =17. b.8 - 3x =14. c.3x + 14 = 15x - 22 d.2 (4x -3) =5 (2x +7)
Matematika
kanesa2
Pertanyaan
selesaikan persamaan berikut ! a.5×-3 =17. b.8 - 3x =14. c.3x + 14 = 15x - 22 d.2 (4x -3) =5 (2x +7)
1 Jawaban
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1. Jawaban raissaaimee
a. 5x - 3 = 17
• 5x = 17 + 3
• 5x = 20
• x = 20/5
• x = 4
b. 8 - 3x = 14
• -3x = 14 - 8
• -3x = 6
• x = 6/-3
• x = -2
c. 3x + 14 = 15x - 22
• 3x - 15x = -22 -14
• -12x = -36
• x = -36/-12
• x = 36/12
• x = 3
d. 2 (4x -3) = 5 (2x +7)
• 2 + 4x -3 = 5 + 2x + 7
• -1 + 4x = 12 + 2x
• 4x - 2x = 12 + 1
• 2x = 13
• x = 13/2
semoga bermanfaat ; )