Matematika

Pertanyaan

selesaikan persamaaan berikut
1. a.5+(x+1) = 2 (x - 10)
b. 1/2 p-2 = p-1/3

2 Jawaban

  • a. 5 + (x+1) = 2 + (x-10)
       6 + x = x - 8
       6 + 8 = 2x
       14 = 2x
       7 = x

  • a. 5 + (x + 1) = 2(x - 10)
    5 + x + 1 = 2x - 20
    2x - x = 20 + 5 + 1
    x = 26

    b. [tex]\frac{1}{2}[/tex](p-2) = p - [tex]\frac{1}{3}[/tex]
    p - 2 = 2(p - [tex]\frac{1}{3}[/tex])
    p - 2 = 2p - [tex]\frac{2}{3}[/tex]
    2p - p = [tex]\frac{2}{3}[/tex] - 2
    p = [tex]\frac{2}{3}[/tex] - [tex]\frac{6}{3}[/tex] = - [tex]\frac{4}{3}[/tex] = - [tex]1\frac{1}{3}[/tex]

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