Matematika

Pertanyaan

diketahui persamaan 2x-4=6x+8. nilai x+5 adalah...
A.-8
B.-2
C.2
D.8

2 Jawaban

  • [tex]2x - 4 = 6x + 8 \\ 2x - 6x = 8 + 4 \\ - 4x = 12 \\ \times = \frac{12}{ - 4} \\ x = - 3[/tex]
    ditanya: x+5
    jawab: c. 2
    [tex]x + 5 \\ - 3 + 5 \\ = 2[/tex]

  • [tex]2x - 4 = 6x + 8 \\ = > 2x - 6x = 8 + 4 \\ = > - 4x = 12 \\ = > x = \frac{12}{ - 4} \\ = > x = - 3 \\ \\ x + 5 \\ = - 3 + 5 \\ = 2[/tex]

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